In general the best time to visit Chiang Rai is probably February, when the weather is usually great. The hottest months are March, April, May, while the coldest months are January, November, December.
Depending on the activities you want to experience, you may choose different months to visit:
The best time for a sunbathing holiday is March, April, May. Average maximum temperatures are up to +35°C in April and it has 10 sunny days on average.
In general, it’s pleasant to walk and do outdoor activities during January - December.
If you want to avoid wet weather, then your choice is August, September, October with the lowest chance of rain.
Average weather in Chiang Rai in different months
This is the average weather in Chiang Rai for each month based on historic data:
In February the weather is great. There are an average of 19 sunny days in February and the temperature ranges from +15°C to +31°C.
January, March, November, December usually has good weather. Average maximum temperature reaches +34°C during March.
In April, June, July, August, September, October the weather is average. Expect around 141 rainy days, and the precipitation amounts to approximately 404 mm in August.
May bring not the best weather. May is the coldest month with the temperature going down to +24°C.
Climate in Chiang Rai
Here is the detailed breakdown of the climate in Chiang Rai for each month:
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Maximum Temperature
+33°C
+37°C
+40°C
+43°C
+43°C
+39°C
+38°C
+36°C
+36°C
+35°C
+35°C
+33°C
Average Maximum Temperature
+28°C
+31°C
+34°C
+35°C
+33°C
+32°C
+31°C
+31°C
+31°C
+30°C
+29°C
+27°C
Minimum Temperature
+7°C
+9°C
+10°C
+17°C
+17°C
+21°C
+22°C
+22°C
+19°C
+15°C
+9°C
+5°C
Avg. water temperature
-
-
-
-
-
-
-
-
-
-
-
-
Humidity, %
76
68
64
67
77
81
83
85
85
83
80
79
Rain, mm
21
16
34
118
314
318
393
404
304
152
53
21
Snow, mm
0
0
0
0
0
0
0
0
0
0
0
0
Average wind speed, m/s
0
0
0
0
0
0
0
0
0
0
0
0
Sunny Days
17
19
19
10
2
0
0
0
0
3
10
15
Cloud Days
6
4
4
4
2
1
1
1
1
4
7
9
Rainy Days
8
5
6
13
22
26
28
27
25
22
13
7
Snowy Days
0
0
0
0
0
0
0
0
0
0
0
0
Average Temperature
Here are the average maximum and minimum temperatures in Chiang Rai during the whole year:
The hottest month in Chiang Rai is April with average maximum temperature going up to +35°C. The coldest month is December with the lowest temperatures of +15°C.
Humidity
The temperature feels different depending on humidity. Here is how humidity in Chiang Rai looks throughout the year, in %:
The most humid month in Chiang Rai is September with average humidity going up to 85%. The least humid month is March with an average humidity of 64%.
Rain
Amount of rainfall in mm. in Chiang Rai during the whole year based on historical data:
The sunniest and driest month is February with approximately 19 sunny days and a total precipitation of around 16 mm. The rainiest and wettest month is August with approximately 27 rainy days and 404 mm of total precipitation.
FAQ
Frequently asked questions about the weather in Chiang Rai:
What is the hottest month in Chiang Rai?
The hottest month in Chiang Rai is April with average maximum temperature of +35°C.
What is the coldest month in Chiang Rai?
The coldest month in Chiang Rai is December with minimum temperatures of +15°C.
Is Chiang Rai worth visiting in winter?
If you are planning to visit Chiang Rai in winter you can expect pretty good weather. The best month is April with +35°C and 10 sunny days.
When does it rain the least in Chiang Rai?
if you're looking to visit Chiang Rai when it rains the least, you should plan your trip for August, July, June. During this time, rainfall is rare with the driest month being February with only 16 mm of rain.
Other cities in Thailand
Check out the weather for other cities in Thailand.
For this page, we’ve looked at the typical weather in Chiang Rai, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.