Mwanza weather by month
Mwanza runs from about 22°C in January to 24°C in September, with November the wettest month at 324 mm.
warmest month
September
24°C
coolest month
January
22°C
wettest month
November
324 mm
worst air month
July
13 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 22°C | 168 mm | 321 h | 10 |
| February | 23°C | 68 mm | 332 h | 10 |
| March | 24°C | 88 mm | 354 h | 8 |
| April | 22°C | 223 mm | 313 h | 5 |
| May | 24°C | 18 mm | 356 h | 6 |
| June | 23°C | 3 mm | 351 h | 9 |
| July | 23°C | 52 mm | 362 h | 13 |
| August | 23°C | 13 mm | 360 h | 12 |
| September | 24°C | 51 mm | 328 h | 10 |
| October | 23°C | 128 mm | 328 h | 8 |
| November | 22°C | 324 mm | 286 h | 6 |
| December | 22°C | 197 mm | 329 h | 8 |
About 4,020 hours of sun a year. Roughly 131 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.