Chiang Mai, Thailand Weather
Chiang Mai hourly forecast: next 24 hours
Today's high of 85°F (29°C) is right in line with the typical September high of 85°F (29°C).
Current conditions in detail
Chiang Mai weather tomorrow (Thursday, September 17)
Tomorrow in Chiang Mai looks light rain shower, with a high of 86° and an overnight low of 70°. There is a 88% chance of rain - plan accordingly. Winds top out near 5 mph, and the UV index reaches 11 (very high).
Chiang Mai 14-day forecast
About the weather in Chiang Mai
Chiang Mai's year is organised around rain rather than temperature. 58% of its 71.4 inches (1815 mm) annual total arrives in the July to September window, while March averages 10 mm (0.4 in). Temperatures move far less: 96°F (35°C) at the year's warmest against 81°F (27°C) at its coolest.
Chiang Mai weather: quick facts
- Hottest month: April - highs near 96°F (35°C)
- Coldest month: January - highs near 81°F (27°C)
- Decade extremes (2015-2024): 108°F (42°C) high · 49°F (10°C) low
- Wettest month: August (29 rainy days) · Sunniest: April (11.1 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 7°C between the average warmest and coolest month · day to night: 9°C
- Months averaging 30°C or hotter: 5
- Average humidity: 73%
Temperatures through the year
Average highs hold at or above 30°C for 5 months of the year, February through June being the unbroken run. April is the warm end of the year, averaging 96°F (35°C) by day and 74°F (24°C) overnight. January is the coolest month, with highs of 81°F (27°C) and lows near 62°F (17°C). The gridded 2015-2024 daily record for this location tops out at 108°F (42°C) and bottoms at 49°F (10°C) - decade extremes, not all-time station records. Rainfall is strongly seasonal: 58% of the annual total falls in the July to September window, leaving March at 10 mm (0.4 in).
Rain, sun and snow
Sunshine averages 9.8 hours a day over the year, peaking in April at 11.1 hours. Between the average April and the average January lie 7°C, a narrower spread than about 80% of the cities we track.
Season by season
March through May
March through May in Chiang Mai brings serious heat, with daytime highs averaging 94°F (34°C) and nights around 74°F (23°C); expect showers on roughly 26 days across the season. Daylight is generous - around 10.9 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
June through August
Through June through August, Chiang Mai runs hot: 86°F (30°C) by day, 75°F (24°C) after dark, and rain falls on around 81 of the 90 days.
September through November
September through November in Chiang Mai is hot, with daytime highs averaging 84°F (29°C) and nights around 71°F (22°C); rain falls on around 52 of the 90 days.
December through February
December through February in Chiang Mai sits firmly in the heat, with daytime highs averaging 83°F (28°C) and nights around 63°F (17°C); rain comes on about 9 days over the three months. Daylight is generous - around 10.4 hours of sun a day.
Average temperatures in Chiang Mai by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 81° | 62° | 4 | 1.0 in | 10.2 h/day | 71% |
| February | 86° | 64° | 1 | 0.8 in | 10.8 h/day | 59% |
| March | 94° | 70° | 2 | 0.4 in | 10.9 h/day | 52% |
| April | 96° | 74° | 7 | 2.2 in | 11.1 h/day | 55% |
| May | 93° | 76° | 17 | 7.2 in | 10.7 h/day | 69% |
| June | 88° | 75° | 24 | 8.7 in | 9.3 h/day | 80% |
| July | 86° | 75° | 27 | 13.1 in | 8.0 h/day | 85% |
| August | 85° | 74° | 29 | 15.4 in | 7.4 h/day | 87% |
| September | 85° | 74° | 26 | 12.9 in | 8.7 h/day | 86% |
| October | 84° | 72° | 18 | 6.8 in | 9.7 h/day | 84% |
| November | 84° | 69° | 8 | 1.9 in | 10.1 h/day | 79% |
| December | 81° | 64° | 3 | 1.0 in | 10.2 h/day | 74% |