Mombasa weather by month
Mombasa runs from about 25°C in August to 29°C in February, with April the wettest month at 364 mm.
warmest month
February
29°C
coolest month
August
25°C
wettest month
April
364 mm
worst air month
January
13 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 28°C | 134 mm | 335 h | 13 |
| February | 29°C | 65 mm | 317 h | 12 |
| March | 29°C | 125 mm | 341 h | 8 |
| April | 27°C | 364 mm | 217 h | 4 |
| May | 27°C | 106 mm | 294 h | 5 |
| June | 26°C | 77 mm | 322 h | 7 |
| July | 26°C | 51 mm | 321 h | 7 |
| August | 25°C | 92 mm | 334 h | 7 |
| September | 26°C | 56 mm | 340 h | 7 |
| October | 27°C | 57 mm | 361 h | 8 |
| November | 27°C | 123 mm | 344 h | 9 |
| December | 27°C | 229 mm | 355 h | 10 |
About 3,881 hours of sun a year. Roughly 143 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 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.