Blumenau weather by month
Blumenau runs from about 17°C in July to 25°C in February, with January the wettest month at 371 mm.
warmest month
February
25°C
coolest month
July
17°C
wettest month
January
371 mm
worst air month
July
15 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 25°C | 371 mm | 295 h | 10 |
| February | 25°C | 232 mm | 267 h | 10 |
| March | 25°C | 109 mm | 286 h | 9 |
| April | 23°C | 175 mm | 226 h | 9 |
| May | 20°C | 185 mm | 208 h | 11 |
| June | 19°C | 93 mm | 239 h | 11 |
| July | 17°C | 150 mm | 186 h | 15 |
| August | 17°C | 30 mm | 265 h | 12 |
| September | 21°C | 99 mm | 231 h | 9 |
| October | 22°C | 142 mm | 245 h | 10 |
| November | 23°C | 189 mm | 222 h | 9 |
| December | 23°C | 256 mm | 262 h | 9 |
About 2,932 hours of sun a year. Roughly 197 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.