Brazzaville weather by month
Brazzaville runs from about 25°C in July to 28°C in May, with November the wettest month at 303 mm.
warmest month
May
28°C
coolest month
July
25°C
wettest month
November
303 mm
worst air month
July
37 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 26°C | 134 mm | 302 h | 21 |
| February | 26°C | 238 mm | 258 h | 20 |
| March | 27°C | 157 mm | 292 h | 25 |
| April | 27°C | 130 mm | 277 h | 21 |
| May | 28°C | 40 mm | 338 h | 23 |
| June | 26°C | 8 mm | 338 h | 35 |
| July | 25°C | 0 mm | 324 h | 37 |
| August | 26°C | 5 mm | 333 h | 34 |
| September | 26°C | 74 mm | 282 h | 33 |
| October | 26°C | 229 mm | 269 h | 30 |
| November | 25°C | 303 mm | 251 h | 19 |
| December | 25°C | 213 mm | 283 h | 21 |
About 3,547 hours of sun a year. Roughly 153 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.