Manaus weather by month
Manaus runs from about 27°C in May to 31°C in September, with February the wettest month at 237 mm.
warmest month
September
31°C
coolest month
May
27°C
wettest month
February
237 mm
worst air month
October
14 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 28°C | 124 mm | 302 h | 10 |
| February | 28°C | 237 mm | 298 h | 11 |
| March | 27°C | 182 mm | 260 h | 8 |
| April | 27°C | 160 mm | 279 h | 8 |
| May | 27°C | 151 mm | 291 h | 9 |
| June | 27°C | 66 mm | 342 h | 9 |
| July | 28°C | 38 mm | 357 h | 10 |
| August | 29°C | 18 mm | 362 h | 11 |
| September | 31°C | 14 mm | 344 h | 14 |
| October | 30°C | 71 mm | 342 h | 14 |
| November | 29°C | 60 mm | 332 h | 13 |
| December | 28°C | 226 mm | 326 h | 8 |
About 3,835 hours of sun a year. Roughly 135 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 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.