Surat Thani climate
Surat Thani (Thailand) has a tropical monsoon climate (Köppen Am). The average temperature over the year is 27 °C80 °F, and about 2,329 mm92 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Surat Thani climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2984 | 2373 | 2678 | 1234.8 |
| Feb | 3086 | 2272 | 2679 | 311.2 |
| Mar | 3188 | 2474 | 2781 | 1104.3 |
| Apr | 3290 | 2577 | 2984 | 1044.1 |
| May | 3188 | 2577 | 2883 | 2178.5 |
| Jun | 3086 | 2476 | 2781 | 2218.7 |
| Jul | 2985 | 2475 | 2780 | 2238.8 |
| Aug | 2985 | 2475 | 2780 | 2168.5 |
| Sep | 2985 | 2475 | 2780 | 26410 |
| Oct | 2985 | 2475 | 2780 | 27611 |
| Nov | 2984 | 2475 | 2780 | 32013 |
| Dec | 2883 | 2374 | 2678 | 2248.8 |
| Year | 3290 | 2272 | 2780 | 2,32992 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 85% | 60% | 4.6 | 11:39 |
| Feb | 83% | 46% | 5.6 | 11:50 |
| Mar | 79% | 49% | 5.9 | 12:03 |
| Apr | 78% | 65% | 5.8 | 12:19 |
| May | 84% | 86% | 5.2 | 12:32 |
| Jun | 87% | 87% | 5.0 | 12:39 |
| Jul | 88% | 89% | 4.9 | 12:36 |
| Aug | 88% | 89% | 4.9 | 12:25 |
| Sep | 88% | 89% | 4.9 | 12:10 |
| Oct | 87% | 86% | 4.4 | 11:54 |
| Nov | 87% | 81% | 3.9 | 11:42 |
| Dec | 87% | 76% | 3.8 | 11:36 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Surat Thani is like
The warmest month is April, with an average high of 32 °C90 °F and a low of 25 °C77 °F. The coldest is January, when highs average 29 °C84 °F and lows 23 °C73 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 3 °C5.4 °F.
It is very wet, receiving about 2,329 mm92 in of precipitation per year. The wettest three-month stretch is September–November, which brings 37% of the annual total. The wettest month is November (320 mm13 in), the driest is February (31 mm1.2 in).
Relative humidity ranges from 78% in April to 88% in August. The clearest skies (lowest average cloud amount, 46%) are typical of February. Average wind speed near the ground ranges from 5 km/h (3 mph) in April to 7 km/h (4 mph) in December. Daylight lasts from about 11.6 hours in December to 12.7 hours in June.
Best time to visit Surat Thani
Based on these averages, the most comfortable months for sightseeing and outdoor activities are February: average highs of 30 °C86 °F to 30 °C86 °F with 31 mm1.2 in to 31 mm1.2 in of precipitation per month.
The most challenging month is November, which is very wet (320 mm13 in) and humid (87% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Surat Thani
- Wetter months (May–December) — highs 2883 to 31 °C88 °F, lows 2374 to 25 °C77 °F, about 245 mm9.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (January–April) — highs 2984 to 32 °C90 °F, lows 2272 to 25 °C77 °F, about 92 mm3.6 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
How Surat Thani compares
Compared with Hat Yai, about 268 km to the southeast, Surat Thani has practically the same average temperature and receives 15% more precipitation (2,329 mm92 in vs 2,020 mm80 in). The difference is largest in August (0.7 °C1.2 °F cooler).
Of the 22 places in Thailand covered by World Climates, Surat Thani is the 17th warmest by annual mean temperature and the 2nd wettest by annual precipitation. See all of them on the Thailand climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Alor Setar (Malaysia, Am), Apartadó (Colombia, Am) and Kendari (Indonesia, Af).
Nearby places
- Nakhon Si Thammarat 105 km · 27 °C81 °F · 2,360 mm93 in
- Hat Yai 268 km · 27 °C81 °F · 2,020 mm80 in
- Langkawi (Kuah) 318 km · 28 °C82 °F · 2,198 mm87 in
- Alor Setar 354 km · 27 °C81 °F · 2,303 mm91 in
- Myeik 376 km · 27 °C81 °F · 1,338 mm53 in
- Hua Hin 388 km · 28 °C82 °F · 1,431 mm56 in
- Kota Kuala Muda 411 km · 27 °C81 °F · 2,353 mm93 in
- Paya Terubong 432 km · 27 °C81 °F · 2,353 mm93 in
Frequently asked questions
What is the warmest month in Surat Thani?
April is the warmest month in Surat Thani, with an average high of 32 °C (90 °F) and an average low of 25 °C (77 °F).
What is the coldest month in Surat Thani?
January is the coldest month, with an average high of 29 °C (84 °F) and an average low of 23 °C (73 °F).
When does it rain the most in Surat Thani?
November is the wettest month with about 320 mm (12.6 in) of precipitation; February is the driest with about 31 mm (1.2 in).
What is the best time to visit Surat Thani?
Judging by long-term averages, the most comfortable months are February.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 66 m, while Surat Thani lies at about 10 m. Temperatures on this page were therefore adjusted by +0.4 °C0.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.