Climate averages 1991–2020
Weather in Thailand in May
In May, average daytime highs across the 46 cities listed in Thailand range from 28.9°C in Phuket to 34.5°C in Nakhon Sawan. Monthly rainfall ranges from 94 mm in Hua Hin to 320 mm in Chanthaburi.
Long-term climate patterns, not a forecast for a particular trip.
City by city
May in Thailand
| City | Average highHigh / low | Average low | Rainfall mm | Rain days |
|---|---|---|---|---|
| Bangkok | 33.4°C26.5°C | 26.5°C | 130 | 20.0 |
| Samut Prakan | 32.6°C27.0°C | 27.0°C | 124 | 18.2 |
| Mueang Nonthaburi | 33.7°C26.3°C | 26.3°C | 130 | 20.0 |
| Chon Buri | 32.5°C26.2°C | 26.2°C | 145 | 21.2 |
| Phra Pradaeng | 33.1°C26.8°C | 26.8°C | 130 | 20.0 |
| Bang Khae | 33.4°C26.9°C | 26.9°C | 130 | 20.0 |
| Hat Yai | 31.4°C25.0°C | 25.0°C | 150 | 23.5 |
| Sai Mai | 33.4°C26.2°C | 26.2°C | 185 | 24.2 |
| Si Racha | 32.1°C26.6°C | 26.6°C | 145 | 21.2 |
| Watthana | 33.0°C26.6°C | 26.6°C | 130 | 20.0 |
| Khlong Sam Wa | 33.2°C26.1°C | 26.1°C | 150 | 22.2 |
| Lat Krabang | 33.1°C26.4°C | 26.4°C | 150 | 22.2 |
| Chatuchak | 33.2°C26.4°C | 26.4°C | 130 | 20.0 |
| Ban Khlong Prawet | 33.1°C26.7°C | 26.7°C | 150 | 22.2 |
| Nong Chok | 33.2°C25.8°C | 25.8°C | 150 | 22.2 |
| Lampang | 32.8°C24.6°C | 24.6°C | 168 | 19.4 |
| Nong Khaem | 33.4°C26.7°C | 26.7°C | 144 | 21.6 |
| Bueng Kum | 33.1°C26.4°C | 26.4°C | 150 | 22.2 |
| Kabin Buri | 32.5°C24.9°C | 24.9°C | 174 | 23.5 |
| Surat Thani | 32.1°C24.9°C | 24.9°C | 124 | 22.1 |
| Udon Thani | 32.6°C25.1°C | 25.1°C | 211 | 21.8 |
| Chiang Mai | 33.1°C24.6°C | 24.6°C | 99 | 13.1 |
| Nakhon Ratchasima | 33.5°C25.2°C | 25.2°C | 140 | 20.0 |
| Hua Hin | 33.0°C26.1°C | 26.1°C | 94 | 17.5 |
| Ban Samae Dam | 32.8°C27.1°C | 27.1°C | 124 | 18.2 |
| Ubon Ratchathani | 33.0°C25.4°C | 25.4°C | 181 | 22.4 |
| Ban I Chang | 34.2°C26.0°C | 26.0°C | 141 | 21.8 |
| Khlong Luang | 33.7°C26.1°C | 26.1°C | 185 | 24.2 |
| Nakhon Pathom | 34.0°C26.2°C | 26.2°C | 141 | 21.8 |
| Thung Khru | 32.7°C27.0°C | 27.0°C | 130 | 20.0 |
| Pattaya | 31.5°C26.8°C | 26.8°C | 152 | 22.3 |
| Khon Kaen | 33.4°C25.4°C | 25.4°C | 152 | 20.1 |
| Rayong | 30.7°C26.2°C | 26.2°C | 220 | 24.9 |
| Nakhon Si Thammarat | 31.3°C24.7°C | 24.7°C | 123 | 23.2 |
| Si Maha Phot | 32.4°C24.9°C | 24.9°C | 209 | 24.0 |
| Chanthaburi | 30.0°C25.5°C | 25.5°C | 320 | 28.2 |
| Yala | 32.5°C24.0°C | 24.0°C | 151 | 22.6 |
| Ratchaburi | 33.9°C26.0°C | 26.0°C | 127 | 21.9 |
| Laem Chabang | 31.3°C26.8°C | 26.8°C | 152 | 22.3 |
| Ban Mai | 30.7°C26.3°C | 26.3°C | 120 | 21.7 |
| Nakhon Sawan | 34.5°C26.3°C | 26.3°C | 156 | 20.9 |
| Phuket | 28.9°C26.6°C | 26.6°C | 266 | 25.1 |
| Nong Prue | 33.0°C24.8°C | 24.8°C | 153 | 22.6 |
| Chiang Rai | 31.5°C23.4°C | 23.4°C | 292 | 22.8 |
| Thawi Watthana | 33.7°C26.6°C | 26.6°C | 130 | 20.0 |
| Sakon Nakhon | 32.2°C25.0°C | 25.0°C | 216 | 22.3 |
A rain day is a local calendar day with at least 1 mm of precipitation.