Pattaya weather by month
Pattaya runs from about 27°C in December to 31°C in April, with October the wettest month at 290 mm.
warmest month
April
31°C
coolest month
December
27°C
wettest month
October
290 mm
worst air month
January
18 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 28°C | 16 mm | 336 h | 18 |
| February | 28°C | 30 mm | 317 h | 17 |
| March | 29°C | 59 mm | 340 h | 15 |
| April | 31°C | 25 mm | 355 h | 13 |
| May | 30°C | 262 mm | 306 h | 7 |
| June | 29°C | 140 mm | 282 h | 5 |
| July | 28°C | 257 mm | 226 h | 5 |
| August | 29°C | 119 mm | 306 h | 5 |
| September | 28°C | 180 mm | 247 h | 4 |
| October | 27°C | 290 mm | 290 h | 11 |
| November | 28°C | 46 mm | 320 h | 13 |
| December | 27°C | 20 mm | 316 h | 13 |
About 3,641 hours of sun a year. Roughly 146 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-22. Full method, licences and the list of sources we rejected are on the methodology page.