MINISTRY OF DIGITAL ECONOMY AND SOCIETY,
THAI METEOROLOGICAL DEPARTMENT

3-month Climate Prediction of Thailand
During March – May 2023
Issued on 28 February 2023----------------------------------------------------------------------------------------------------------------------------Thailand climate for March – April - May from 30-year normal (A.D. 1991 - 2020 or B.E. 2534 2563 baseline average)
March Sweltering and dry weather with little humidity appears along with very hot
weather on some days, specifically at the Upper Thailand due to mostly prevailing southerly
wind over Thailand. However, at some periods, coldly high-pressure air masses from China willmeet hot air masses already prevailing over Thailand. This brings about summer
thunderstorms, specifically around the Upper Thailand. The summer thunderstorms often
occur during short duration and at narrow areas. Commonly, severely gusty wind often appears
too and feasibly causes damages to life and property.
April This is the most sweltering month for the whole year, especially around the Upper
Thailand. Often, hot to very hot weather occurs together with low-pressure air mass cells alongwith more heat prevailing over the Upper Thailand. The reason is that this month is at theduration of the Sun radiates perpendicularly to the plane of Thailand. As a result, summer
thunderstorms occur influencing the rain amount of this month to increase more than that ofthe past month in every part of Thailand.
May As being the transitional period from the summer to the rainy seasons, thecommon weather during the 1st half of this month is usually sweltering. Also, thunder rainstorms and summer thunderstorms occur often. Sometimes, hail happens too. And from theinfluential heat low-pressure air mass cells, mostly at the 2nd half of this month as the start ofthe rainy season, temperature will reduce with increasing rain. In other words, the prevailingwind over Thailand will start to transform into southwest monsoon while the low-pressure
trough placing over Malaysia moves upward to place over the Southern Thailand and thecentral part of Thailand consecutively. Besides, some tropical cyclones developing in theAndaman Sea and the Bay of Bengal may move near or toward the western side of Thailand
further.

Climate Center, Meteorological Development Division, Thai Meteorological Department www.climate.tmd.go.thPrecipitation (mm/month) and Anomaly (mm/month) Forecast:
Precipitation forecast for
March 2023

Precipitation forecast for
April 2023

Precipitation forecast for
May 2023

Precipitation anomaly forecast for
March 2023

Precipitation anomaly forecast for
April 2023

Precipitation anomaly forecast for
May 2023

Climate Center, Meteorological Development Division, Thai Meteorological Department www.climate.tmd.go.thMean Maximum Temperature (°C) and Anomaly (°C) Forecast:Mean maximum temperature
forecast for March 2023

Mean maximum temperature
forecast for April 2023

Mean maximum temperature
forecast for May 2023

Mean maximum temperature
anomaly forecast
for March 2023

Mean maximum temperature
anomaly forecast
for April 2023

Mean maximum temperature
anomaly forecast
for May 2023

Climate Center, Meteorological Development Division, Thai Meteorological Department www.climate.tmd.go.thMean Minimum Temperature (°C) and Anomaly (°C) Forecast:Mean minimum temperature
forecast for March 2023

Mean minimum temperature
forecast for April 2023

Mean minimum temperature
forecast for May 2023

Mean minimum temperature
anomaly forecast
for March 2023

Mean minimum temperature
anomaly forecast
for April 2023

Mean minimum temperature
anomaly forecast
for May 2023Climate Center, Meteorological Development Division, Thai Meteorological Department www.climate.tmd.go.th*** Caution: ***March and April 2023: Frequently, summer thunderstorms occur as thunder rain with gusty windand perhaps falling hail at some areas causing life and property damages. Consequently, the publicshould follow weather forecast news from the Thai Meteorological Department closely further.
During late April and May 2023: Probably, some low-pressure air mass cells develop around theAndaman Sea. These may strengthen to become depressions and tropical cyclones further. Theirmovements are toward northerly to easterly and may move closely toward the western side ofThailand. Thus, the western portions of both of the northern and central parts including with thatof the Southern Thailand will meet more rain.
The public then should follow the weather forecast news from the Thai MeteorologicalDepartment closely.
_________________________________________________________________________________________________
Below right Image source:
https://www.researchgate.net/figure/Study-area-the-Indochina-Peninsula-in-Monsoon-Southeast-Asia_fig5_296329477

Climate Center, Meteorological Development Division, Thai Meteorological Department www.climate.tmd.go.thTable 1: Prediction of Rain (mm = millimeters), Rainy Days (days) and comparing with normal
PartRain(mm)Northern
Northeastern
CentralEastern
SouthernThailand(East Coast)
SouthernThailand(West Coast)
Bangkok
Metropolisand Vicinity

20-40
30-50
30-50
50-80
60-90
80-11030-50March 2023
Rainy Comparing
Days with normal
10%
Below
3-5
normal
10%
Below
4-6
normal
10%
Below
3-5
normal
10%
Below
5-7
normal10%
Below5-7normal
8-1010%Below
normal

3-510%
Below
normalPrediction
April 2023
Rain Rainy Comparing(mm) Days with normal
10%
Below
50-80
3-4
normal
10%
Below
60-90
4-6
normal
10%
Below
60-90
4-6
normal10%Below80-110 5-7
normal
10%
Below
60-90
5-7
normal10%Below140-180 8-10
normal70-100

4-6

10%
Below
normalRain(mm)170-210May 2023
Rainy Comparing
Days with normal
10%
Above
14-17
normal
10%
Above
14-17
normal
10%
Above
13-16
normal
10%
Above
14-17
normal
10%
Above
13-16
normalNormal (Baseline period: 1991-2020)
AprilMarchMayRain Rainy Rain Rainy Rain Rainy(mm) Days (mm) Days (mm) Days
32.4

3.4

70.5

6.8

173.3

14.9

45.1

4.9

85.0

7.8

188.8

15.0

42.1

3.8

77.6

6.4

165.9

14.0

66.5

6.0

102.0

8.3

205.3

15.0

86.7

5.7

79.5

7.0

130.3

13.4

300-350 18-21

10%
Above
normal

103.6

8.1

162.2

13.1

300.6

19.6

210-260 14-17

10%
Above
normal

51.0

4.1

93.3

6.5

216.8

15.0

180-220160-200
200-250
120-160

Climate Center, Meteorological Development Division, Thai Meteorological Department www.climate.tmd.go.thTable 2 : Prediction of Mean Maximum Temperature (Tmax) and Mean Minimum Temperature (Tmin) (°C) comparing with normal:
Part
Northern
Northeastern
CentralEastern
Southern (EastCoast)
Southern(West Coast)
Bangkok andVicinity

Prediction
April 2023

March 2023
MeanTmax

MeanTmin

35-37

21-23

34-36

22-24

35-37

24-26

33-35

24-26

32-34

23-25

33-35

23-25

34-36

25-27

Comparingwith Normal

Near
normalNearnormalNearnormalNearnormalNearnormalNearnormalNearnormalMeanTmax

MeanTmin

36-38

23-25

35-37

24-2636-38

25-27

34-36

25-27

33-35

24-26

33-35

24-26

35-37

26-28

Normal (Baseline period: 1991-2020)*
MarchApril
MayMay 2023

Comparingwith Normal

Near
normalNearnormal
Nearnormal
Near
normalNearnormalNearnormalNearnormalMean
Tmax

MeanTmin

34-36

24-26

34-36

24-26

35-37

25-27

33-35

25-27

33-35

24-26

32-34

24-26

34-36

26-28

Comparingwith Normal

Near
normalNearnormalNearnormalNearnormalNearnormalNearnormalNearnormalRemarks:

MeanTmax

MeanTminMeanTmax

MeanTminMeanTmax

MeanTmin

36.1

20.7

37.2

23.7

35.2

24.4

35.2

22.7

36.2

24.6

34.9

25.1

36.2

24.4

37.1

25.7

35.7

25.8

33.9

25.1

34.7

26.0

34.1

26.1

32.7

23.9

33.8

24.8

33.9

25.1

34.3

24.0

34.2

24.7

32.9

24.9

34.7

26.4

35.7

27.2

35.1

26.9

- * Normal means average during the 30-year period (A.D. 1991 – 2020 or B.E. 2534 – 2563).
- This long-range climate forecast is created by applying some climate models and statistical methods,
the public then should follow the daily weather forecast news from the Thai Meteorological Department for more accuracy further.
- The next 3-month climate forecast will be published online before the end of December 2021.
- Further enquiry of monthly climate, 3-month climate and seasonal forecasts can be preceded at Tel: (662)-398-9929 or Fax: (662)-383-8827
Climate Center, Meteorological Development Division,
Thai Meteorological Department,
Ministry of Digital Economy and Society

Climate Center, Meteorological Development Division, Thai Meteorological Department www.climate.tmd.go.th