Bujumbura weather by month
Bujumbura runs from about 23°C in June to 25°C in September, with January the wettest month at 194 mm.
warmest month
September
25°C
coolest month
June
23°C
wettest month
January
194 mm
worst air month
August
39 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 24°C | 194 mm | 305 h | 23 |
| February | 24°C | 69 mm | 313 h | 22 |
| March | 24°C | 68 mm | 337 h | 19 |
| April | 23°C | 150 mm | 315 h | 10 |
| May | 24°C | 34 mm | 362 h | 13 |
| June | 23°C | 8 mm | 347 h | 18 |
| July | 24°C | 0 mm | 350 h | 32 |
| August | 24°C | 2 mm | 353 h | 39 |
| September | 25°C | 26 mm | 344 h | 29 |
| October | 24°C | 70 mm | 332 h | 22 |
| November | 24°C | 93 mm | 317 h | 16 |
| December | 24°C | 61 mm | 339 h | 18 |
About 4,014 hours of sun a year. Roughly 77 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.