Chiang Rai Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Chiang Rai.
Climate overview of Chiang Rai
The climate in Chiang Rai, Chiang Rai Province, Thailand, sees a moderate range of temperatures across the year, from 36°C (97°F) in April down to 28°C (82°F) in December.
The city has a wet climate, receiving around 1937 mm (76 in) of rainfall per year. Despite the high annual total, it has distinct dry (December to March) and wet (May to September) seasons. August is the wettest month. March is the sunniest month, averaging 9.8 hours of sunshine per day.
Chiang Rai Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chiang Rai - and find the best time to visit.
Monthly Temperature in Chiang Rai
The weather in Chiang Rai changes moderately throughout the year, offering enough variation to appreciate each season. On average, daytime temperatures range from a very hot 36°C (97°F) in April to a comfortable 28°C (82°F) in December.
Nighttime temperatures range from 25°C (77°F) in April to 15°C (59°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Chiang Rai
Chiang Rai experiences significant rainfall throughout the year, averaging 1937 mm (76 in) of precipitation annually. The seasons in Chiang Rai bring significant changes in precipitation. The wettest month, August, receives heavy rainfall, with an average of 366 mm (14 in) of precipitation. This rainfall is distributed across 23 rainy days.
In contrast, the driest month, February, experiences much less rainfall, totaling 14 mm (0.6 in) over a single rainy day. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Chiang Rai Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Chiang Rai
In Chiang Rai, summer days are longer and more sunny, with daily sunshine hours peaking at 9.8 hours in March. As the darker season arrives, the brightness of the sun becomes less. August sees a soft sun for only 3.9 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Chiang Rai by Month
The relative humidity is high throughout the year in Chiang Rai.
The city experiences its highest humidity in August, reaching 84%. In March, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Chiang Rai
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: December
- Warmest weather: March and April
- Most sunshine: March and April
- Fewest rainy days: January, February, March and December
- Wettest months: May, June, July, August and September, when rainfall is highest.
- Seasonal pattern: Distinct dry (December to March) and wet (May to September) seasons
Frequently asked questions about the climate in Chiang Rai
What is the best time to visit Chiang Rai?
December typically offers the most optimal weather in Chiang Rai. In contrast, March, April, May, June, July, August and September tend to have less optimal conditions. Chiang Rai has distinct dry (December to March) and wet (May to September) seasons.
What temperatures can I expect in Chiang Rai?
Daytime highs range from 28°C (82°F) in December to 36°C (97°F) in April. Nighttime lows range from 15°C (59°F) to 25°C (77°F).
How much rain does Chiang Rai get?
Annual rainfall is around 1937 mm (76 in). August is the wettest month with 366 mm (14 in), while February is the driest with 14 mm (0.6 in).
How sunny is Chiang Rai?
Chiang Rai receives around 2,555 hours of sunshine per year. March is the sunniest month with 295 hours, while August is the cloudiest with just 117 hours. Overall, Chiang Rai enjoys abundant sunshine.
Chiang Rai 3-Day Forecast
Chiang Rai on the map
Chiang Rai is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Bangkok
34°C (93°F) Jomtien Beach
32°C (90°F) Hua Hin32°C (90°F) Chiang Mai32°C (90°F) Koh Samui30°C (86°F) Ao Nang Beach30°C (86°F) Ko Lanta30°C (86°F) Patong Beach30°C (86°F) 
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