When to go · Thailand
When to go to Chiang Mai
When to go
What the averages say
On these averages, Chiang Mai has a mean high between 18°C and 32°C and under 150 mm of rain in June and October to February.
Of those months, it is also dry (under 50 mm of rain) and not humid in December to February.
- Hot months (a mean high of 32°C or more): March and April.
- Wet months (150 mm of rain or more): May and July to September.
- Humid months (a high of 25°C or more with relative humidity of 70% or more): May to November.
- The warmest month is April (34°C) and the coolest December (24°C). The wettest is August (237 mm) and the driest February (5 mm); about 1,246 mm of rain falls in a year.
How these sentences are worded
Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.
The year at a glance
- Mild to warm and dry
- Mild to warm, humid or showery
- Hot
- Cool
- Wet
- Cold
- JanMild–warm, dry
- FebMild–warm, dry
- MarHot
- AprHot
- MayWet
- JunMild–warm, mixed
- JulWet
- AugWet
- SeptWet
- OctMild–warm, mixed
- NovMild–warm, mixed
- DecMild–warm, dry
Month by month
Every month in Chiang Mai
| Month | High | Low | Rain | Humidity | Cloud | Sunlight (kWh/m²/day) | High in Dubai | What it is like |
|---|---|---|---|---|---|---|---|---|
| January | 26°C | 13°C | 15 mm | 67% | 28% | 4.6 | 23°C | Mild to warm and dry |
| February | 29°C | 14°C | 5 mm | 56% | 21% | 5.3 | 24°C | Mild to warm and dry |
| March | 32°C | 17°C | 23 mm | 52% | 32% | 5.6 | 27°C | Hot |
| April | 34°C | 20°C | 63 mm | 56% | 47% | 6 | 31°C | Hot |
| May | 31°C | 21°C | 189 mm | 75% | 80% | 5.4 | 35°C | Wet |
| June | 29°C | 21°C | 141 mm | 81% | 94% | 4.6 | 37°C | Mild to warm, humid or showery |
| July | 28°C | 20°C | 178 mm | 83% | 95% | 4.2 | 39°C | Wet |
| August | 27°C | 20°C | 237 mm | 87% | 95% | 4.1 | 39°C | Wet |
| September | 27°C | 20°C | 222 mm | 89% | 89% | 4.5 | 37°C | Wet |
| October | 26°C | 19°C | 123 mm | 87% | 69% | 4.4 | 34°C | Mild to warm, humid or showery |
| November | 25°C | 16°C | 37 mm | 82% | 41% | 4.6 | 29°C | Mild to warm, humid or showery |
| December | 24°C | 14°C | 13 mm | 76% | 34% | 4.4 | 25°C | Mild to warm and dry |
The Dubai column is Dubai's mean daily high, for comparison.
Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.
The model's grid cell sits about 446 m higher than the town, so real temperatures there run a little warmer than these.
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