Wallops Flight Facility Climatology

Below is a review of climatology for Wallops Flight Facility (WFF) at Wallops Island, VA. 

The data include surface and upper-level temperature and wind, lightning, precipitation, 

snowfall, cloud cover, and sea state.

Surface Data

Location: Wallops Flight Facility, VA (KWAL)

Monthly Surface Wind (1981-2021)

Month Avg. Wind Speed 

(kts) Avg. Wind Direction Record Peak Gust (mph)

January 8.50 308.26 70 (1/23/16)

February 8.90 325.08 63 (2/13/72)

March 9.50 341.68 68 (3/31/89)

April 9.55 200.29 61 (4/6/71)

May 8.41 149.88 67 (5/11/08)

June 8.07 186.12 69 (6/26/88)

July 7.30 197.76 67 (7/25/94)

August 7.09 165.48 68 (8/4/20)

September 8.13 071.05 70 (9/27/85)

October 8.06 000.94 68 (10/29/12)

November 7.72 313.71 76 (11/12/68)

December 7.87 297.17 73 (12/10/92)

Hourly Surface Wind (1981-2021)

January

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 7.14 370.28 12 7.60 310.17

01 7.26 307.93 13 8.52 309.64

02 7.31 300.89 14 9.46 318.55

03 7.62 308.06 15 9.75 317.07

04 7.94 302.59 16 10.42 311.01

05 7.81 302.35 17 10.64 305.05

06 7.77 305.01 18 10.31 300.93

07 7.57 308.81 19 10.04 302.23
08 7.76 308.09 20 9.63 309.12

09 7.74 309.02 21 8.46 310.82

10 7.65 304.67 22 7.35 317.88

11 7.68 302.53 23 7.18 313.68

February

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 8.11 332.85 12 7.58 324.58

01 8.03 325.76 13 9.15 329.89

02 8.20 331.20 14 10.13 338.13

03 7.84 321.90 15 10.44 337.55

04 7.30 313.89 16 11.04 328.03

05 7.22 307.40 17 11.01 316.91

06 7.55 316.90 18 10.93 317.00

07 7.59 326.70 19 10.84 311.58

08 7.68 330.33 20 10.52 315.20

09 7.37 329.11 21 9.62 322.80

10 7.38 326.27 22 8.35 332.21

11 7.59 320.49 23 7.80 327.44

March

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 8.19 090.56 12 8.46 350.07

01 8.45 280.38 13 9.86 351.44

02 8.37 310.67 14 10.54 354.25

03 8.31 332.09 15 11.09 353.66

04 8.35 329.56 16 11.45 341.22

05 8.14 339.36 17 11.44 328.83

06 7.88 332.31 18 11.43 307.36

07 7.83 336.82 19 11.66 292.06

08 7.73 336.36 20 11.28 250.88

09 7.76 338.14 21 10.74 257.88

10 8.02 350.68 22 9.24 112.74

11 8.32 347.26 23 8.47 117.50
April

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 8.81 154.40 12 8.71 319.30

01 8.58 158.64 13 10.18 328.72

02 8.50 169.94 14 10.77 326.71

03 8.04 194.45 15 11.02 345.66

04 7.66 209.54 16 11.68 134.38

05 7.62 252.00 17 11.87 188.71

06 7.53 264.31 18 11.84 182.38

07 7.60 288.68 19 11.97 182.16

08 7.61 295.72 20 11.62 174.62

09 7.49 284.70 21 11.05 170.47

10 7.26 288.17 22 10.00 160.43

11 8.07 335.52 23 9.13 148.00

May

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 7.84 141.85 12 7.79 332.01

01 7.65 150.00 13 8.74 001.03

02 7.45 155.05 14 9.52 036.04

03 7.28 166.23 15 9.83 105.13

04 7.03 174.75 16 10.37 121.94

05 6.71 225.76 17 10.69 151.91

06 6.28 244.46 18 10.63 152.51

07 6.07 292.43 19 10.71 156.85

08 6.09 324.11 20 10.66 164.26

09 6.22 013.59 21 10.29 155.40

10 6.48 359.21 22 8.97 152.56

11 7.13 338.66 23 8.32 141.86

 

June

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 7.59 170.55 12 7.26 264.55

01 7.12 180.47 13 8.37 284.96

02 7.13 191.63 14 8.85 146.41

03 6.86 193.14 15 9.13 167.22
04 6.71 198.38 16 9.86 163.06

05 6.12 210.84 17 10.31 169.49

06 6.14 216.23 18 10.37 176.10

07 5.69 233.23 19 10.72 171.45

08 5.63 247.91 20 10.59 173.25

09 5.49 241.57 21 10.15 171.90

10 6.00 248.24 22 9.52 164.96

11 6.61 258.27 23 8.24 173.55

July

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 6.86 189.02 12 6.52 258.99

01 6.49 192.95 13 7.65 256.53

02 6.34 200.39 14 7.98 202.91

03 6.25 206.90 15 8.36 177.42

04 5.98 216.48 16 9.02 180.99

05 5.38 221.13 17 9.54 177.76

06 5.19 235.94 18 9.61 178.32

07 5.03 243.89 19 10.09 180.54

08 4.96 250.58 20 10.02 181.27

09 4.79 256.43 21 9.56 181.10

10 4.87 258.50 22 8.79 180.62

11 5.51 255.76 23 7.64 184.11

August

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 6.57 169.95 12 6.40 345.45

01 6.28 173.93 13 7.42 041.27

02 6.00 188.56 14 8.09 070.74

03 5.84 193.25 15 8.30 123.26

04 5.23 205.83 16 8.84 141.34

05 5.14 230.21 17 9.63 147.28

06 4.96 251.58 18 9.62 149.95

07 4.77 244.76 19 9.97 154.52

08 4.58 280.28 20 9.55 160.32

09 4.54 296.17 21 9.00 158.51

10 4.61 293.65 22 8.26 159.09

11 5.24 307.60 23 7.46 163.60
September

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 7.29 102.51 12 6.97 029.50

01 7.08 095.53 13 8.72 041.79

02 7.06 091.44 14 9.52 059.02

03 6.81 084.28 15 9.69 067.08

04 6.77 067.23 16 10.43 077.91

05 6.62 041.98 17 10.76 092.51

06 6.44 043.94 18 10.37 097.14

07 6.22 024.78 19 10.70 101.77

08 6.23 015.60 20 10.41 095.76

09 6.18 016.55 21 9.68 099.11

10 6.07 011.06 22 8.17 095.16

11 6.26 016.83 23 7.30 098.78

October

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 6.94 022.69 12 7.23 350.13

01 7.24 030.20 13 8.62 355.12

02 7.04 010.01 14 9.46 002.43

03 6.81 342.21 15 9.64 011.04

04 7.00 353.50 16 10.27 016.89

05 6.54 342.75 17 10.46 011.71

06 6.51 350.78 18 10.11 028.07

07 6.50 346.78 19 10.33 021.18

08 6.63 346.63 20 9.82 025.09

09 6.62 345.57 21 8.55 036.13

10 6.61 340.70 22 7.45 033.11

11 6.63 343.26 23 6.69 021.35
November

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 6.43 295.90 12 6.71 317.67

01 6.60 310.39 13 7.89 325.30

02 6.48 311.84 14 9.06 326.04

03 6.45 309.40 15 9.52 328.88

04 6.60 304.50 16 10.03 322.16

05 6.66 300.23 17 10.23 310.90

06 6.64 299.88 18 9.97 298.76

07 6.50 308.88 19 9.90 313.42

08 6.37 311.94 20 9.06 308.17

09 6.44 313.02 21 7.73 306.53

10 6.28 313.82 22 6.73 296.01

11 6.31 314.55 23 6.96 330.25

December

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

Time 

(UTC)

Avg. Wind 

Speed (kts)

Avg. Wind 

Direction

00 6.84 290.24 12 7.00 307.20

01 6.98 281.12 13 7.92 306.04

02 7.01 288.38 14 8.81 315.09

03 7.05 281.66 15 9.20 312.86

04 7.01 285.49 16 9.92 307.39

05 7.02 293.94 17 9.87 302.71

06 7.14 287.63 18 9.64 299.39

07 7.12 284.52 19 9.64 300.70

08 7.07 288.32 20 8.84 293.03

09 6.97 292.46 21 7.59 295.43

10 7.03 298.47 22 6.82 290.21

11 6.96 302.20 23 6.73 266.47
Surface Temperature (1963-2022)

Precipitation (1963-2022)

20

30

40

50

60

70

80

90

JAN FEB MARCH APRIL MAY JUNE JULY AUGUST SEPT OCT NOV DEC

TEMPERATURE (F)

MONTH

Average Temperature Data 1963-2022 

Average High Daily Average Average Low

JAN FEB MARCH APRIL MAY JUNE JULY AUGUST SEPT OCT NOV DEC

Average Precip (in) 3.22 2.98 3.67 2.92 3.27 3.32 3.98 4.06 3.69 3.48 2.74 3.46

Precip Days 10.7 9.7 10.3 10.1 10.4 9.2 10.5 8.6 7.7 7.9 8.5 9.8

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

Precipitation (in)

Average Precipitation & Precipitation Days
Snowfall (1963-2023)

Lightning Data

SOURCE: Earth Networks Total Lightning Network. Includes cloud-to-cloud, cloud-to-ground, 

and intra-cloud lightning detected within 15 nautical miles (nm) of WFF.

*Cumulative total strikes for each month.

27.9 " 

0

5

10

15

20

25

30

1963/19641964/19651965/19661966/19671967/19681968/19691969/19701970/19711971/19721972/19731973/19741974/19751975/19761976/19771977/19781978/19791979/19801980/19811981/19821982/19831983/19841984/19851985/19861986/19871987/19881988/19891989/19901990/19911991/19921992/19931993/19941994/19951995/19961996/19971997/19981998/19991999/20002000/20012001/20022002/20032003/20042004/20052005/20062006/20072007/20082008/20092009/20102010/20112011/20122012/20132013/20142014/20152015/20162016/20172017/20182018/20192019/20202020/20212021/20222022/2023

SNOWFALL (in)

WINTER SEASON

SEASONAL SNOWFALL 

0

20000

40000

60000

80000

100000

120000

140000

160000

180000

JAN FEB MARCH APRIL MAY JUNE JULY AUGUST SEPT OCT NOV DEC

NUMBER OF STRIKES

MONTH

2013 -2023 Cumulative Lightning Strikes Within 

15nm by Month 
*Lightning day defined as day with at least one (1) lightning strike within 15nm.

*Fall & Winter defined as October – March.

0

2

4

6

8

10

12

JAN FEB MARCH APRIL MAY JUNE JULY AUGUST SEPT OCT NOV DEC

NUMBER OF DAYS

MONTH

Average Number of Lightning Day(s) per Month 

2013-2023

0

5

10

15

20

25

0000-0400 0401-0800 0801-1200 1201-1600 1601-2000 2001-2359

NUMBER OF EVENTS

LOCAL TIME

Fall & Winter Lightning Events within 15nm 

2013-2023
*Spring & Summer defined as April – September.

Sky Coverage / Cloud Data

SOURCE: KWAL ASOS (1997-2013)

* Wallops Flight Facility flight rule cloud ceiling percentage by month from 1997-2017. Flight 

rule percentage is calculated based on cloud ceiling height. VFR is greater than 3000’. MVRF is 

less or equal to 3000’. IFR is less than 1000’. LIFR is less than 500’.

0

20

40

60

80

100

120

140

160

180

200

0000-0400 0401-0800 0801-1200 1201-1600 1601-2000 2001-2359

NUMBER OF EVENTS

LOCAL TIME

Spring & Summer Lightning Events within 15nm 

2013-2023

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

PERCENTAGE

MONTH

WFF Flight Rule Ceiling Percentage

VRF MVFR IFR LIFR
*Percentage of time with clear skies

Upper-Level Data

SOURCE: National Weather Service (NWS) upper air observations (1981-2021) via balloons 

released from KWAL at 00 & 12 UTC.

January

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 785.09 1.94 -6.66 276.60 23.37

850 1463.64 -0.47 -11.06 275.40 26.18

700 3001.97 -5.86 -20.65 269.42 38.18

500 5569.78 -20.5 -35.17 266.21 59.54

300 9162.19 -45.11 -58.02 264.19 89.24

200 11792.15 -55.73 -73.63 265.93 95.25

100 16155.84 -62.01 -82.81 268.19 61.96

10 30601.88 -51.23 -81.12 276.26 48.74

0%

10%

20%

30%

40%

50%

60%

PERCENTAGE

MONTH

WFF Monthly Clear Sky Percentage
12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 781.87 0.62 -7.37 283.98 24.45

850 1459.34 -1.19 -12.09 271.99 26.54

700 2994.42 -6.49 -20.89 265.65 39.19

500 5556.93 -20.84 -35.18 264.54 60.80

300 9146.40 -45.23 -58.31 264.12 89.95

200 11775.45 -55.76 -73.37 266.18 96.02

100 16139.93 -61.88 -82.96 265.58 62.15

10 30594.16 -49.77 -78.35 265.82 48.38

February

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 779.81 2.53 -6.39 273.17 23.69

850 1463.74 0.27 -11.09 274.98 26.90

700 3004.19 -5.80 -20.10 271.83 38.28

500 5571.79 -20.51 -35.31 268.27 58.55

300 9164.47 -45.24 -57.44 266.42 87.93

200 11789.98 -55.65 -72.68 268.14 94.82

100 16162.96 -61.67 -82.91 269.82 60.20

10 30630.64 -49.98 -81.02 283.83 37.45

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 780.32 1.36 -6.69 290.07 23.53

850 1461.91 -0.66 -11.23 276.24 25.72

700 2999.35 -6.12 -20.32 267.16 38.50

500 5563.69 -20.84 -34.79 266.96 60.13

300 9149.85 -45.66 -57.60 266.08 88.82

200 11773.34 -55.69 -72.95 268.71 94.18

100 16151.64 -61.40 -82.48 267.96 61.51

10 30645.00 -48.28 -77.39 266.40 39.59
March

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 782.98 5.49 -3.06 275.82 22.22

850 1470.52 2.43 -8.34 277.77 25.39

700 3021.29 -4.48 -18.87 277.97 33.84

500 5598.31 -19.76 -35.35 275.20 50.20

300 9194.89 -45.33 -57.43 271.90 75.42

200 11818.48 -56.66 -72.71 272.70 81.39

100 16192.51 -60.85 -81.79 274.57 49.55

10 30780.36 -46.35 -78.77 276.84 34.47

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 784.06 4.05 -4.45 295.39 23.00

850 1469.34 1.63 -8.50 281.39 24.17

700 3017.11 -4.80 -18.84 273.07 33.75

500 5591.44 -20.06 -34.31 271.87 50.21

300 9184.25 -45.53 -57.68 271.26 74.95

200 11806.52 -56.40 -72.81 272.87 79.60

100 16188.33 -60.32 -81.72 271.41 49.68

10 30780.44 -45.65 -74.76 267.40 34.03

April

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 779.36 10.78 1.56 260.48 21.20

850 1479.43 6.65 -3.30 273.21 23.99

700 3051.00 -1.47 -15.62 279.65 30.52

500 5654.03 -17.45 -33.63 276.00 42.03

300 9282.93 -43.58 -56.35 273.67 61.74

200 11913.41 -57.50 -72.42 273.04 67.77

100 16270.83 -60.57 -81.66 276.40 37.50

10 30990.15 -43.79 -78.44 279.19 25.26
12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 786.50 9.80 0.67 284.62 22.33

850 1482.92 5.93 -4.02 281.10 22.21

700 3050.94 -1.90 -15.77 272.84 29.88

500 5651.31 -17.57 -33.59 270.98 42.96

300 9278.45 -43.72 -56.79 271.63 62.34

200 11908.92 -57.42 -73.26 275.50 66.26

100 16267.21 -60.28 -82.50 272.91 38.00

10 30996.70 -43.03 -75.61 264.13 23.96

May

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 796.37 14.85 7.42 261.52 17.80

850 1508.46 10.68 2.66 276.48 19.31

700 3101.96 2.03 -11.02 280.58 24.49

500 5742.46 -13.56 -29.90 276.91 34.25

300 9429.85 -40.24 -53.01 272.83 50.66

200 12083.28 -57.83 -70.33 273.94 56.62

100 16400.95 -61.81 -81.39 282.04 27.02

10 31219.92 -40.60 -76.32 006.33 13.88

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 801.48 14.04 6.38 288.69 17.76

850 1511.98 10.06 2.08 277.87 17.98

700 3102.96 1.63 -11.04 274.61 24.43

500 5740.45 -13.71 -30.85 273.33 34.12

300 9424.88 -40.52 -54.06 274.32 49.34

200 12075.37 -57.97 -71.23 280.11 55.79

100 16391.86 -61.70 -82.34 280.77 26.98

10 31237.48 -40.01 -74.21 111.65 13.73
June

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 804.53 19.09 12.64 250.29 14.82

850 1527.36 14.60 6.93 279.85 15.98

700 3144.89 6.01 -7.63 286.27 19.24

500 5825.28 -9.37 -26.91 282.26 26.71

300 9578.76 -35.83 -49.66 276.02 41.05

200 12274.52 -55.75 -67.77 275.27 49.55

100 16561.62 -63.79 -81.90 294.33 20.23

10 31446.40 -38.74 -76.26 085.62 23.51

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 807.24 18.49 11.77 287.29 14.90

850 1529.10 14.02 7.21 279.88 15.46

700 3143.05 5.44 -7.14 272.54 20.69

500 5819.69 -9.70 -27.34 271.13 26.79

300 9569.48 -36.12 -50.80 274.22 38.88

200 12261.47 -55.98 -69.19 280.26 47.57

100 16547.84 -63.90 -83.35 290.05 20.60

10 31448.04 -38.60 -74.49 092.49 24.82

July

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 814.20 21.36 15.37 244.51 13.56

850 1545.26 16.66 10.06 274.05 14.22

700 3174.95 7.78 -4.13 279.27 16.86

500 5873.59 -7.47 -24.16 280.01 23.34

300 9660.45 -33.42 -48.16 272.97 37.37

200 12381.57 -54.11 -66.31 274.68 44.86

100 16656.82 -64.68 -81.36 293.26 15.86

10 31579.56 -39.05 -75.27 084.94 36.17
12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 816.29 20.78 14.68 283.73 13.10

850 1547.03 16.03 10.39 274.87 13.71

700 3172.91 7.19 -3.97 270.42 18.89

500 5867.36 -7.77 -25.27 265.93 23.52

300 9649.73 -33.78 -49.18 268.51 33.57

200 12365.65 -54.32 -68.20 278.70 41.25

100 16641.06 -64.76 -82.70 288.48 16.15

10 31565.75 -39.02 -74.04 091.53 37.82

August

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 818.87 20.42 15.00 248.74 12.67

850 1546.41 15.98 9.27 280.78 13.63

700 3172.80 7.51 -5.41 277.19 15.88

500 5870.23 -7.56 -25.96 275.34 22.23

300 9653.41 -33.72 -47.88 268.32 38.08

200 12362.56 -53.99 -66.94 267.41 46.93

100 16643.44 -64.86 -81.52 278.45 16.40

10 31516.74 -41.19 -75.80 083.47 30.43

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 823.00 19.80 13.96 300.60 12.54

850 1549.31 15.32 9.02 282.85 12.82

700 3172.01 6.91 -5.86 272.27 17.24

500 5865.62 -7.84 -26.67 266.00 22.81

300 9643.81 -34.12 -49.78 264.97 35.65

200 12357.81 -54.05 -68.68 272.06 43.97

100 16641.48 -64.81 -83.00 278.42 17.04

10 31527.50 -40.56 -75.48 090.79 30.47
September

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 819.70 17.64 12.23 287.88 14.84

850 1542.32 13.79 4.94 286.01 14.79

700 3159.08 6.37 -8.75 274.29 17.76

500 5844.80 -8.83 -27.90 269.44 25.19

300 9605.41 -35.25 -49.01 260.66 41.25

200 12306.88 -54.70 -67.88 259.57 50.96

100 16577.07 -66.32 -82.41 268.23 22.56

10 31318.92 -43.74 -76.56 060.55 14.75

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 822.78 16.96 11.58 353.44 15.50

850 1543.32 13.14 4.74 284.28 14.89

700 3156.86 5.91 -9.13 266.67 19.21

500 5837.98 -9.17 -28.71 261.12 26.30

300 9594.67 -35.66 -50.83 259.23 40.73

200 12295.15 -54.61 -69.90 262.83 49.48

100 16572.65 -66.07 -84.05 267.28 22.43

10 31332.62 -43.57 -76.73 094.43 13.86

October

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 810.72 12.85 5.55 279.37 17.87

850 1521.76 9.61 -1.78 280.53 18.45

700 3115.07 2.89 -14.01 272.74 23.99

500 5766.12 -12.22 -31.58 266.09 36.69

300 9473.77 -38.61 -52.94 262.83 56.01

200 12151.22 -55.33 -70.44 264.30 65.67

100 16436.10 -66.20 -83.00 266.18 35.78

10 31044.80 -47.53 -79.56 273.33 28.63
12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 812.41 11.87 4.81 303.61 17.92

850 1522.10 8.87 -2.05 278.03 17.97

700 3112.03 2.40 -13.84 268.01 25.29

500 5759.62 -12.60 -32.11 264.82 36.53

300 9463.13 -38.82 -53.75 263.84 56.50

200 12139.27 -55.42 -71.81 266.57 65.89

100 16428.07 -65.90 -83.97 266.90 35.70

10 31050.85 -47.12 -77.51 268.16 28.36

November

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 810.87 7.95 -0.93 276.98 20.92

850 1507.17 5.48 -6.94 275.39 22.50

700 3078.07 -0.53 -17.58 269.66 31.42

500 5696.63 -15.57 -32.61 265.37 47.73

300 9355.49 -41.56 -53.88 264.14 71.09

200 12004.37 -56.90 -71.78 266.21 79.18

100 16303.12 -65.01 -82.64 267.67 47.11

10 30761.80 -51.42 -81.92 269.92 48.39

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 809.58 6.64 -2.00 296.33 20.64

850 1502.10 4.67 -7.26 273.42 22.25

700 3069.37 -1.18 -17.82 265.22 31.73

500 5681.79 -16.08 -32.82 264.90 48.38

300 9334.84 -41.92 -55.02 264.86 70.29

200 11981.96 -56.66 -72.94 267.57 78.33

100 16287.57 -64.60 -83.46 266.48 46.46

10 30752.48 -50.58 -79.34 266.96 47.63
December

00Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 794.23 4.18 -4.42 274.16 22.72

850 1482.86 1.84 -10.06 273.09 25.98

700 3034.46 -3.62 -19.33 267.82 37.57

500 5625.11 -18.21 -33.50 265.06 58.63

300 9251.99 -43.23 -54.60 264.76 87.32

200 11891.86 -56.65 -72.05 266.43 95.12

100 16216.39 -63.55 -82.40 267.68 59.30

10 30560.27 -52.64 -82.32 268.29 57.46

12Z

Pressure 

Level (mb)

Average 

Height (m)

Average 

Temperature 

(°C)

Average 

Dewpoint (°C)

Average Wind 

Direction

Average Wind 

Speed (kts)

925 793.95 3.55 -4.99 280.99 22.50

850 1480.52 1.45 -9.70 270.25 25.32

700 3030.69 -3.89 -18.76 264.41 38.07

500 5618.60 -18.50 -33.07 264.30 58.54

300 9240.61 -43.48 -55.24 264.97 85.86

200 11877.92 -56.81 -72.44 267.14 93.98

100 16201.93 -63.49 -82.84 266.72 58.98

10 30614.21 -51.22 -78.05 266.43 55.56
Sea State Data

SOURCE: BUOY STATION 44089 – Wallops Island, VA (2016-2021).