Climate averages 1991–2020
Surat Thani weather
in May.
A hot, wet month: the 3rd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Surat Thani: daytime highs average 32.1°C and nights cool to about 24.9°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 124 mm of rain on roughly 22 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 32 min on an average May day.
The nearest other city in this atlas is Nakhon Si Thammarat (105 km away). In May its highs average 31.3°C, 0.8°C cooler than Surat Thani, with 123 mm of rain.
Among the 46 cities listed in Thailand, Surat Thani ranks joint 36th of 46 for the warmest May highs and joint 5th of 46 for the driest May (rainfall, lowest first). The mean May high of those 46 cities is 32.7°C; Surat Thani is 0.6°C cooler than that mean.
From May to June, average highs fall by 0.8°C to 31.3°C, and monthly rainfall falls from 124 mm to 95 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Surat Thani climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.6°C22.6°C | 22.6°C | 68 | 9.5 | 11.712 h |
| February | 31.8°C22.9°C | 22.9°C | 32 | 4.8 | 11.812 h |
| March | 33.3°C24.0°C | 24.0°C | 92 | 9.1 | 12.112 h |
| April | 33.4°C24.9°C | 24.9°C | 114 | 14.4 | 12.312 h |
| May, selected | 32.1°C24.9°C | 24.9°C | 124 | 22.1 | 12.513 h |
| June | 31.3°C24.6°C | 24.6°C | 95 | 18.6 | 12.613 h |
| July | 31.1°C24.4°C | 24.4°C | 89 | 18.4 | 12.613 h |
| August | 30.9°C24.3°C | 24.3°C | 108 | 19.7 | 12.412 h |
| September | 30.2°C23.9°C | 23.9°C | 154 | 23.6 | 12.212 h |
| October | 29.2°C23.6°C | 23.6°C | 268 | 27.3 | 11.912 h |
| November | 28.6°C23.5°C | 23.5°C | 267 | 23.5 | 11.712 h |
| December | 28.4°C23.1°C | 23.1°C | 149 | 15.7 | 11.612 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Nakhon Si Thammarat in MayThailand · 105 kmHigh 31.3°C · Low 24.7°C · 123 mm rain
- Phuket in MayThailand · 173 kmHigh 28.9°C · Low 26.6°C · 266 mm rain
- Ban Mai in MayThailand · 253 kmHigh 30.7°C · Low 26.3°C · 120 mm rain
- Hat Yai in MayThailand · 268 kmHigh 31.4°C · Low 25.0°C · 150 mm rain
- Alor Setar in MayMalaysia · 354 kmHigh 30.5°C · Low 25.0°C · 243 mm rain
- Yala in MayThailand · 360 kmHigh 32.5°C · Low 24.0°C · 151 mm rain
- Pendang in MayMalaysia · 372 kmHigh 30.5°C · Low 24.5°C · 237 mm rain
- Myeik in MayMyanmar · 376 kmHigh 30.0°C · Low 24.9°C · 430 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Surat Thani) is explained once on the Surat Thani year overview and on the Sources, method and limits page.