worldweather28°Cnear normal
usually 26°C–29°C
night: exceptionally warm
rain: typical rainfall
wind: exceptionally strong
Weather in Chiang Mai - 14-day forecast
Detailed weather forecast for Chiang Mai, Thailand: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Chiang Mai
today🌧️
28°💧 8.3 mm
Sun🌧️
32°💧 5.1 mm
Mon🌧️
31°💧 1.7 mm
Tue🌧️
29°💧 4.6 mm
Wed🌧️
29°💧 4 mm
Thu🌧️
32°💧 15 mm
Fri🌧️
30°💧 16.2 mm
Sat🌧️
32°💧 5.9 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Sunday 6 Sept in Chiang Mai, the forecast high is 32°C. Typical daytime temperatures at this time of year range from 26°C to 29°C, so it will be exceptionally warm. It is warmer than 99% of similar days.
32°Cexceptionally warm
usually 26°C–29°C
warmer than 99% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally strong
31°Cexceptionally warm
usually 26°C–29°C
warmer than 97% of similar days
night: exceptionally warm
rain: less rain than usual
wind: stronger than usual
29°Cwarmer than usual
usually 26°C–29°C
warmer than 80% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally light
29°Cexceptionally warm
usually 26°C–29°C
warmer than 90% of similar days
night: exceptionally warm
rain: typical rainfall
wind: exceptionally strong
32°Cexceptionally warm
usually 26°C–29°C
warmer than 99% of similar days
night: exceptionally warm
rain: more rain than usual
wind: lighter than usual
30°Cexceptionally warm
usually 26°C–29°C
warmer than 96% of similar days
night: exceptionally warm
rain: more rain than usual
wind: exceptionally strong
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 27°C by day. The coolest year was 1989 (26°C) and the warmest was 2009 (31°C). The current forecast averages 30°C - higher than in 98% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
14-day forecast - Chiang Mai
Chiang Mai 30 & 45-day weather - long-range outlook
Next 16 days · forecast
32°
around 25° at night · days with rain: 12
Weeks 3-4 · avg for September
32°
around 24° at night · rain chance 64%
Weeks 5-7 · avg for October
32°
around 23° at night · rain chance 39%
The 30 & 45-day outlook for Chiang Mai: the next 16 days are a numerical forecast updated daily - on average 32° by day and 25° at night. Further out we rely on multi-year climate averages: around 32° in September, and about 32° in October. Forecasts beyond two weeks are indicative only.
Day-by-day forecast for Chiang Mai
Saturday5 September 2026
🌧️28°light rain
Sunday6 September 2026
🌧️32°light rain
Monday7 September 2026
🌧️31°light rain
Tuesday8 September 2026
🌧️29°light rain
Wednesday9 September 2026
🌧️29°light rain
Thursday10 September 2026
🌧️32°moderate rain
Friday11 September 2026
🌧️30°moderate rain
Saturday12 September 2026
🌧️32°light rain
Sunday13 September 2026
🌧️33°light rain
Monday14 September 2026
🌧️33°light rain
Tuesday15 September 2026
🌧️33°light rain
Wednesday16 September 2026
🌧️34°light rain
Thursday17 September 2026
🌧️34°light rain
Friday18 September 2026
🌧️35°moderate rain
Saturday19 September 2026
🌧️29°moderate rain
Sunday20 September 2026
🌧️32°moderate rain
UV index in Chiang Mai - is it safe to sunbathe?
Today the UV index in Chiang Mai is 8 (very high) - unprotected fair skin can burn in about 25 minutes. SPF 50, long sleeves and shade between 10:00 and 16:00.
Chiang Mai weather through the year
Warmest, driest months on average: January, February, October, November.
Upcoming public holidays in Thailand: King Bhumibol Memorial Day — 13 October · Chulalongkorn Day — 23 October · King Bhumibol's Birthday, National Day and Father's Day — 7 December. Full calendar and travel notes
Nearby and related places
FAQ - Chiang Mai weather
What is the weather like in Chiang Mai today?
Today it is about 28° during the day and 28° at night, light rain.
How far ahead can I check the forecast for Chiang Mai?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.