Musanze weather by month
Musanze runs from about 17°C in November to 19°C in September, with April the wettest month at 177 mm.
warmest month
September
19°C
coolest month
November
17°C
wettest month
April
177 mm
worst air month
August
34 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 18°C | 100 mm | 291 h | 26 |
| February | 19°C | 78 mm | 307 h | 21 |
| March | 19°C | 81 mm | 346 h | 16 |
| April | 18°C | 177 mm | 301 h | 11 |
| May | 18°C | 40 mm | 347 h | 13 |
| June | 18°C | 3 mm | 354 h | 19 |
| July | 19°C | 8 mm | 353 h | 30 |
| August | 19°C | 12 mm | 344 h | 34 |
| September | 19°C | 49 mm | 333 h | 24 |
| October | 18°C | 105 mm | 330 h | 18 |
| November | 17°C | 168 mm | 318 h | 14 |
| December | 17°C | 93 mm | 332 h | 18 |
About 3,956 hours of sun a year. Roughly 92 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 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.