Mumbai weather by month
Mumbai runs from about 25°C in January to 31°C in May, with July the wettest month at 1134 mm.
warmest month
May
31°C
coolest month
January
25°C
wettest month
July
1134 mm
worst air month
February
65 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 25°C | 2 mm | 331 h | 60 |
| February | 26°C | 0 mm | 318 h | 65 |
| March | 27°C | 0 mm | 344 h | 35 |
| April | 30°C | 0 mm | 357 h | 28 |
| May | 31°C | 12 mm | 360 h | 20 |
| June | 28°C | 499 mm | 225 h | 18 |
| July | 27°C | 1134 mm | 81 h | 18 |
| August | 27°C | 390 mm | 217 h | 19 |
| September | 26°C | 356 mm | 247 h | 19 |
| October | 27°C | 130 mm | 296 h | 36 |
| November | 28°C | 1 mm | 312 h | 55 |
| December | 26°C | 1 mm | 309 h | 52 |
About 3,397 hours of sun a year. Roughly 134 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.