Mirissa weather by month
Mirissa runs from about 26°C in November to 28°C in April, with May the wettest month at 471 mm.
warmest month
April
28°C
coolest month
November
26°C
wettest month
May
471 mm
worst air month
January
31 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 26°C | 208 mm | 298 h | 31 |
| February | 28°C | 63 mm | 331 h | 25 |
| March | 28°C | 124 mm | 348 h | 22 |
| April | 28°C | 197 mm | 321 h | 14 |
| May | 27°C | 471 mm | 269 h | 10 |
| June | 27°C | 224 mm | 313 h | 9 |
| July | 27°C | 181 mm | 323 h | 11 |
| August | 27°C | 240 mm | 291 h | 10 |
| September | 27°C | 235 mm | 300 h | 9 |
| October | 26°C | 267 mm | 262 h | 13 |
| November | 26°C | 334 mm | 260 h | 15 |
| December | 26°C | 153 mm | 307 h | 23 |
About 3,623 hours of sun a year. Roughly 249 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 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.