Pai weather by month
Pai runs from about 21°C in January to 28°C in April, with August the wettest month at 411 mm.
warmest month
April
28°C
coolest month
January
21°C
wettest month
August
411 mm
worst air month
April
43 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 21°C | 20 mm | 323 h | 11 |
| February | 22°C | 1 mm | 317 h | 15 |
| March | 25°C | 9 mm | 339 h | 25 |
| April | 28°C | 6 mm | 350 h | 43 |
| May | 27°C | 268 mm | 323 h | 7 |
| June | 26°C | 315 mm | 262 h | 3 |
| July | 26°C | 361 mm | 264 h | 3 |
| August | 25°C | 411 mm | 207 h | 4 |
| September | 26°C | 357 mm | 247 h | 5 |
| October | 25°C | 174 mm | 317 h | 7 |
| November | 23°C | 84 mm | 281 h | 7 |
| December | 22°C | 10 mm | 307 h | 9 |
About 3,537 hours of sun a year. Roughly 177 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 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.