08/2010 Update 
Table of Contents 

1. Definitions 

2. Map of the Morongo Indian Reservation with Weather and Air Monitoring Stations 

Data Summary Tables 

3. Public Works Weather Station 

4. Well 6 Weather Station 

5. Wastewater Treatment Plant Weather Station 

6. Morongo Reservation Average 

Temperature Graphs 

7. Monthly Temperature (2005-2009) 

Precipitation Graphs 

8. Monthly Rainfall (2005-2009) 

9. Daily Rainfall: Public Works (2005-2009) 

10. Annual Rainfall (2005-2009) 

Wind Graphs 

11. 2009 Windroses 

12. WWTP Windroses (2005 –2009) 

13. WWTP Monthly Windspeed (2007, 2009) 

14. WWTP Hourly Wind Speed (2007) 

Fuel Graphs 

15. Fuel Moisture and Temperature: Well 6 (2009) 

Solar Graphs 

16. Solar Insolation (2009) 

Air Quality Graphs 

17. Ozone (2007-2009) 

18. Ozone vs. Wind Direction (2007-2009) 

19. PM2.5 (2007-2009) 

20. PM2.5 vs. Wind Direction (2007-2009) 

Introduction 

The following data were collected at three weather stations and one air monitoring station located on the 

Morongo Indian Reservation. The weather stations include a CS3001 Anemometer/Wind Vane, a CS500 

Temperature/RH Probe, an LI200X Pyronometer, a TE525 Rain Gauge, a CS205 Fuel Temperature Stick, and a 

CS505-L Fuel Moisture Stick. The air monitoring station includes a 49c Thermo Ozone Analyzer, and Met One 

BAM1020 PM2.5 Analyzer, and an RM Young wind assembly. This summary was prepared by Jason Mandly, 

Environmental Specialist, and James Payne, Environmental Supervisor/GIS, with the Morongo Environmental 

Protection Department 
Definitions 

Average High (Low): This value takes the average of the highest (lowest) recorded temperature per day. Units are 

in degrees Fahrenheit 

Fuel Moisture: The percent of the total weight of vegetation that is water 

Fuel Temperature: The temperature of dry vegetation 

Insolation: A measure of energy received from solar radiation. Units are in kilowatts per square meter 

Max High (Min Low): This value represents the highest (lowest) temperature recorded 

Ozone: An invisible gas and pollutant at lower levels of the atmosphere. Units are in parts per million (ppm) 

PM2.5: Particles sized under 2.5 micrograms. A pollutant. Units are in micrograms per cubic meter. 

PW: Public Works Weather Station 

Well 6: Well 6 Weather Station, located in Potrero Canyon 

Windrose: A graphic representation of wind direction versus another value (wind speed, pollution 

concentration, etc.) 

Wind Speed: Measured in meters per second (m/s). 1 m/s = 2.24 miles per hour 

WWTP: Wastewater Treatment Plant Weather Station, located east of the Casino 

Date Rainfall Average High Average Low Max High Min Low Total Annual Rainfall

Jan‐05 9.80 59.51 46.91 74.80 34.68 23.27

Feb‐05 6.09 58.99 46.95 66.54 41.38

Note: The PW weather

station is missing several

days of data in Jan‐05.

Rainfall Totals are less

than what actually fell.

1.63 inches were re‐

corded. An additional

8.7 inches were added

through extrapolation.  

Mar‐05 1.52 64.91 48.32 82.10 42.76 Rainfall is in inches

Apr‐05 0.87 71.77 49.65 85.80 41.32 Temp is in degrees F

May‐05 0.42 81.32 56.61 98.70 47.18

Jun‐05 0.04 84.59 59.74 98.30 52.99

Jul‐05 0.14 98.49 73.47 106.60 66.12

Aug‐05 1.68 96.37 70.97 104.80 59.02

Sep‐05 0.19 87.86 64.29 97.90 53.83

Oct‐05 1.80 78.53 58.12 91.40 48.38

Nov‐05 0.00 71.81 54.74 82.60 41.09

Dec‐05 0.72 64.87 48.48 77.90 40.13

Jan‐06 1.33 63.09 46.36 73.40 37.62 14.65

Feb‐06 2.85 68.08 48.64 79.60 31.28

Mar‐06 4.36 58.79 42.30 76.60 34.08

Apr‐06 3.62 66.98 47.78 84.30 40.35

May‐06 0.23 83.54 57.48 97.80 48.21

Jun‐06 0.19 95.67 67.07 104.90 53.82

Jul‐06 0.02 100.21 74.33 112.50 65.46

Aug‐06 0.00 96.27 68.73 104.50 59.86

Sep‐06 0.01 90.56 67.91 103.40 53.62

Oct‐06 0.19 76.31 57.13 88.00 48.54

Nov‐06 0.33 73.92 54.93 91.30 38.75

Dec‐06 1.52 64.21 45.56 75.90 35.94

Jan‐07 0.50 59.83 43.19 75.10 27.21 10.45

Feb‐07 1.97 64.14 46.76 79.10 34.43

Mar‐07 0.49 74.51 51.54 92.20 37.97

Apr‐07 0.63 74.11 52.39 96.70 42.21

May‐07 0.00 83.39 56.81 92.80 46.88

Jun‐07 0.01 92.09 65.18 100.30 48.68

Jul‐07 0.00 98.65 72.34 109.70 64.02

Aug‐07 0.01 98.60 73.10 109.30 62.47

Sep‐07 0.01 87.43 64.56 105.60 50.48

Oct‐07 0.16 79.22 58.47 90.50 45.93

Nov‐07 3.27 74.90 56.36 85.50 42.27

Dec‐07 3.40 58.19 42.72 78.40 32.90

Jan‐08 7.71 56.84 43.90 68.22 38.62 19.53

Feb‐08 4.78 62.32 46.04 77.00 34.31

Mar‐08 0.41 69.14 49.91 81.20 35.27

Apr‐08 0.05 74.25 52.09 91.50 42.03

May‐08 0.45 76.92 54.37 101.80 43.24

Jun‐08 0.05 94.42 66.88 106.70 47.12

Jul‐08 0.00 97.61 71.59 106.00 64.76

Aug‐08 0.42 97.04 72.17 104.00 66.24

Sep‐08 0.03 94.33 70.19 103.80 59.08

Oct‐08 0.10 84.36 63.62 96.40 44.91

Nov‐08 1.39 74.73 57.71 86.60 46.71

Dec‐08 4.14 58.78 44.47 77.60 33.12

Jan‐09 0.15 66.07 51.67 77.40 36.18 10.43

Feb‐09 4.95 59.91 45.91 75.20 33.98

Mar‐09 0.28 67.38 47.86 83.40 37.04

Apr‐09 0.68 72.05 50.29 96.00 39.80

May‐09 0.00 87.74 61.75 100.20 51.84

Jun‐09 0.05 82.29 59.22 103.30 51.19

Jul‐09 0.00 99.13 73.19 108.70 67.79

Aug‐09 0.00 96.91 70.99 107.10 56.67

Sep‐09 0.00 95.06 71.89 102.80 55.25

Oct‐09 0.04 77.45 57.37 96.20 42.22

Nov‐09 0.81 72.58 54.16 89.20 42.33

Dec‐09 3.47 58.72 44.39 72.90 35.37    
Date Rainfall Average High Average Low Max High Min Low Annual Total Rainfall

Jan‐05 12.25 57.68 40.43 72.60 29.49 28.77

Feb‐05 6.62 56.47 41.08 64.29 35.92

Mar‐05 2.04 62.52 42.60 80.20 34.60 Rainfall is in inches

Apr‐05 1.18 68.77 42.88 83.50 34.48 Temp is in degrees F

May‐05 0.50 77.76 49.54 95.30 39.64

Jun‐05 0.03 81.47 53.20 95.50 45.88

Jul‐05 0.10 95.29 65.18 103.50 55.80

Aug‐05 2.02 93.06 64.54 100.60 57.30

Sep‐05 0.22 84.77 56.39 94.50 43.62

Oct‐05 2.74 76.39 50.76 90.60 41.69

Nov‐05 0.00 69.80 45.98 80.50 32.27

Dec‐05 1.07 62.63 41.37 77.50 30.40   

Jan‐06 2.01 60.93 38.69 73.70 28.18 16.74

Feb‐06 3.20 65.30 40.79 77.40 25.41

Mar‐06 4.96 56.20 36.86 74.70 27.50

Apr‐06 3.95 64.76 42.07 83.00 35.08

May‐06 0.28 80.62 50.57 94.20 35.08

Jun‐06 0.06 92.04 58.85 99.90 47.27

Jul‐06 0.05 96.44 67.74 108.00 58.90

Aug‐06 0.00 92.83 62.93 102.20 55.38

Sep‐06 0.00 87.79 59.70 100.60 43.98

Oct‐06 0.23 73.22 49.18 83.30 40.42

Nov‐06 0.34 71.22 46.96 89.20 30.29

Dec‐06 1.66 62.05 38.47 74.10 27.64

Jan‐07 0.61 57.14 35.54 74.00 18.74 11.63

Feb‐07 2.19 61.10 39.68 77.10 28.16

Mar‐07 0.58 71.41 43.48 89.80 25.53

Apr‐07 0.76 70.56 45.45 92.30 33.96

May‐07 0.00 80.44 49.75 89.20 42.16

Jun‐07 0.01 88.80 56.76 96.80 40.12

Jul‐07 0.00 95.56 64.87 107.20 57.49

Aug‐07 0.03 95.42 66.69 106.30 55.32

Sep‐07 0.06 84.62 57.74 103.50 43.98

Oct‐07 0.07 76.37 52.14 88.10 36.16

Nov‐07 3.09 72.69 48.22 83.30 33.52

Dec‐07 4.23 55.77 36.00 75.50 26.49

Jan‐08 8.98 54.96 37.22 67.25 28.17 24.26

Feb‐08 5.96 60.17 39.63 75.80 29.81

Mar‐08 0.29 66.89 41.48 79.20 31.25

Apr‐08 0.22 71.19 45.12 88.70 34.67

May‐08 0.84 73.30 47.17 98.10 36.99

Jun‐08 0.07 90.84 58.54 102.30 41.93

Jul‐08 0.01 94.36 63.43 103.80 55.20

Aug‐08 0.72 93.97 64.06 101.80 57.91

Sep‐08 0.08 91.38 61.79 100.00 50.22

Oct‐08 0.12 81.96 54.66 95.60 35.34

Nov‐08 1.54 72.39 49.56 84.60 38.27

Dec‐08 5.43 56.72 37.96 77.10 26.01   

Jan‐09 0.18 64.35 42.81 76.20 28.78 12.95

Feb‐09 6.03 57.81 38.98 74.50 24.28

Mar‐09 0.42 65.28 40.12 81.10 27.84

Apr‐09 0.59 68.76 43.56 93.20 30.38

May‐09 0.00 84.63 53.56 97.20 42.29

Jun‐09 0.02 79.09 53.61 100.30 45.33

Jul‐09 0.00 95.99 65.32 106.40 59.82

Aug‐09 0.00 93.58 62.91 102.90 50.26

Sep‐09 0.01 92.22 63.29 99.40 48.58

Oct‐09 0.09 74.50 49.70 93.20 34.33

Nov‐09 0.76 70.57 46.00 88.00 35.57

Dec‐09 4.85 56.49 37.63 72.10 27.31    
Date Rainfall Average High Average Low Max High Min Low Annual Total Rainfall

Jan‐05 5.95 61.72 45.41 76.70 35.35 14.86

Feb‐05 3.89 62.28 47.17 68.87 40.15

Mar‐05 0.99 69.05 48.31 85.50 38.65 Rainfall is in inches

Apr‐05 0.60 75.58 50.22 89.50 39.64 Temp is in degrees F

May‐05 0.15 85.13 60.04 102.50 48.41

Jun‐05 0.00 88.15 62.21 101.20 55.81

Jul‐05 0.05 101.47 76.37 109.90 67.32

Aug‐05 0.04 99.93 73.47 108.30 61.61

Sep‐05 0.12 91.34 65.04 101.30 56.01

Oct‐05 2.89 81.58 57.53 94.90 47.87

Nov‐05 0.00 74.48 51.78 85.50 34.42

Dec‐05 0.18 67.92 46.79 81.20 36.45   

Jan‐06 0.85 66.30 45.32 75.90 31.72 10.14

Feb‐06 2.05 71.32 46.92 83.50 32.00

Mar‐06 2.76 62.75 44.36 81.10 34.64

Apr‐06 2.12 71.11 49.80 88.80 40.96

May‐06 0.02 87.83 60.57 104.60 49.13

Jun‐06 0.74 98.81 70.33 107.90 57.14

Jul‐06 0.66 102.77 77.86 115.90 68.87

Aug‐06 0.00 99.10 72.02 107.50 63.05

Sep‐06 0.01 93.79 68.01 107.00 53.98

Oct‐06 0.02 79.32 57.67 89.80 45.03

Nov‐06 0.01 76.26 53.26 92.30 34.28

Dec‐06 0.90 66.42 43.43 79.20 30.65   

Jan‐07 0.10 62.68 41.36 77.40 21.26 5.00

Feb‐07 0.59 67.33 46.73 81.90 32.96

Mar‐07 0.12 77.58 53.10 95.00 31.76

Apr‐07 0.26 77.91 54.19 103.10 37.51

May‐07 0.00 86.76 58.42 95.60 50.09

Jun‐07 0.00 95.40 68.15 107.10 50.75

Jul‐07 0.00 101.38 74.37 113.10 66.73

Aug‐07 0.07 100.83 75.83 109.70 60.41

Sep‐07 0.00 90.14 66.85 107.10 52.13

Oct‐07 0.04 81.93 60.04 92.90 49.07

Nov‐07 2.27 76.99 53.90 88.50 43.29

Dec‐07 1.55 60.22 42.20 76.30 31.48   

Jan‐08 5.05 58.98 42.23 71.40 34.34 12.10

Feb‐08 1.78 65.19 44.58 80.10 32.68

Mar‐08 0.36 73.11 48.49 86.20 37.54

Apr‐08 0.00 77.66 51.73 93.00 44.61

May‐08 0.14 80.30 56.39 105.60 46.17

Jun‐08 0.00 98.13 69.95 110.40 53.32

Jul‐08 0.23 100.79 73.64 110.70 66.55

Aug‐08 0.06 100.13 74.61 106.50 69.35

Sep‐08 0.00 97.88 70.63 109.20 59.57

Oct‐08 0.00 87.47 61.44 99.50 39.52

Nov‐08 0.96 77.30 55.94 87.30 45.27

Dec‐08 3.52 61.24 43.90 78.50 30.29

Jan‐09 0.01 69.09 46.11 80.70 31.90 6.10

Feb‐09 3.37 62.91 46.09 76.30 36.89

Note: The WWTP

weather station is

missing several days

of data in Jan and Feb

09. 1.63 inches were

recorded. An addi‐

tional 1.78 inches

were added through

extrapolation.  

Mar‐09 0.11 71.17 46.67 87.40 37.86

Apr‐09 0.05 75.79 51.01 99.90 39.76

May‐09 0.00 91.28 63.51 102.50 55.10

Jun‐09 0.01 85.74 62.36 106.60 54.21

Jul‐09 0.00 102.24 76.75 111.50 70.10

Aug‐09 0.00 100.12 73.76 109.80 60.32

Sep‐09 0.00 97.98 71.18 106.20 57.62

Oct‐09 0.00 80.58 56.52 98.50 39.66

Nov‐09 0.24 75.25 51.54 90.50 42.15

Dec‐09 2.31 63.63 44.11 76.40 35.50    
Date

Average

Rainfall Average High Average Low Max High Min Low Average Annual Rainfall

January 3.96 61.28 43.14 80.70 18.74 14.99

February 3.75 62.89 44.40 83.50 24.28   

March 1.31 67.38 45.69 95.00 25.53 Average High Temperature

April 1.04 72.08 48.55 103.10 30.38 78.09

May 0.20 82.73 55.77 105.60 35.08   

June 0.09 89.84 62.14 110.40 40.12 Average Low Temperature

July 0.08 98.69 71.36 115.90 55.20 54.75

August 0.34 96.94 69.78 109.80 50.26

September 0.05 91.14 65.30 109.20 43.62 Highest Recorded Temperature

October 0.57 79.28 56.29 99.50 34.33 115.90

November 1.00 73.66 52.07 92.30 30.29 7/22/2006

December 2.60 61.19 42.50 81.20 26.01 Lowest Recorded Temperature

 18.74

 1/14/2007

 

 
Monthly Temperatures for the Morongo Indian Reservation: 2005 — 2009 
Well 6 (Potrero Canyon) 

Public Works 

Water Treatment Plant 

Monthly Rainfall for the Morongo Indian Reservation: 2005 — 2009 

Note: The WWTPweather station ismissing several

weeks of data in Jan

and Feb 09. Rainfall

Totals are less than

what actually fell

(an estimated

amount of 1.78 in.

can be added for an

extrapolated fig‐ure.)

Note: The PW weather station

is missing several days of data

in Jan‐05. Rainfall Totals are

less than what actually fell. An

estimated 8.7 in. may be

added for an extrapolatedfigure.
Daily Rainfall Amounts for the Public Works Weather Station: 2005 — 2009 
2005 2006 2007 2008 2009 

Well 6 (Potrero Canyon) 

Public Works 

Water Treatment Plant 

Annual Rainfall for the Morongo Indian Reservation: 2005 — 2009 

Note: The WWTPweather station ismissing several

weeks of data in Jan

and Feb 09. Rainfall

Totals are less than

what actually fell

(an estimated

amount of 1.78 in.

can be added for an

extrapolated fig‐ure.)

Note: The PW weather station

is missing several days of data

in Jan‐05. Rainfall Totals are

less than what actually fell. An

estimated 8.7 in. may be

added for an extrapolatedfigure.
Over 20 0.00

15 ‐ 20 0.1210 ‐ 15 3.51

5 ‐ 10 38.10

1 ‐ 5 47.630 ‐ 1 2.88

Mi/hr %

2009 Public Works Data: 

% of time that wind came 

from the following directions 

2009 Public Works Data: % of time that wind blew 

within the following wind 

speed ranges (hourly average) 

N 6.81 

NNE 5.84 

NE 6.23 

ENE 7.59 

E 7.00 

ESE 7.00 

SE 6.42 

SSE 5.64 

S 6.81 

SSW 8.37 

SW 7.78 

WSW 6.23 

W 5.64 

WNW 4.67 

NW 4.67 

NNW 3.31 

Mi/hr 
N 1.0

NNE 1.6

NE 3.5

ENE 5.1

E 5.8

ESE 4.2

SE 2.2

SSE 2.6

S 3.5

SSW 6.4

SW 11.2

WSW 15.4

W 15.7

WNW 12.8

NW 6.4

NNW 2.6

direction %

Over 20 0.01

15 ‐ 20 3.1910 ‐ 15 36.38

5 ‐ 10 39.80

1 ‐ 5 19.360 ‐ 1 1.25

Mi/hr %

2009 Data: 

% of time that wind came 

from the following directions 

2009 Data: 

% of time that wind blew 

within the following wind 

speed ranges (hourly average) 

Mi/hr 
13.4 

11.2 8.94 6.72 4.47 2.24 
13.4 

11.2 8.94 6.72 4.47 2.24 
0

908070605040302010

100

Fuel Moisture (%)Fuel Temperature (F)Poly.(Fuel Moisture (%))

10-hr Fuel Moisture and Fuel Temperature (Well 6 Weather Station): 2009 

Highest Daily 8-hr Average Ozone Concentration: 2007 — 2009 

EPA Standard: 0.075ppm 

24-hr Average PM2.5 Concentration: 2007 — 2009 

EPA Standard: 35ug/m3