Coimbatore weather by month
Coimbatore runs from about 24°C in July to 31°C in April, with May the wettest month at 244 mm.
warmest month
April
31°C
coolest month
July
24°C
wettest month
May
244 mm
worst air month
December
33 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 25°C | 54 mm | 319 h | 32 |
| February | 28°C | 1 mm | 333 h | 32 |
| March | 30°C | 1 mm | 369 h | 31 |
| April | 31°C | 15 mm | 357 h | 25 |
| May | 28°C | 244 mm | 270 h | 14 |
| June | 26°C | 175 mm | 259 h | 7 |
| July | 24°C | 145 mm | 214 h | 6 |
| August | 25°C | 119 mm | 312 h | 8 |
| September | 26°C | 77 mm | 325 h | 9 |
| October | 25°C | 218 mm | 276 h | 14 |
| November | 25°C | 156 mm | 268 h | 28 |
| December | 25°C | 95 mm | 300 h | 33 |
About 3,602 hours of sun a year. Roughly 132 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.