Fortaleza weather by month
Fortaleza runs from about 26°C in June to 28°C in January, with March the wettest month at 359 mm.
warmest month
January
28°C
coolest month
June
26°C
wettest month
March
359 mm
worst air month
September
9 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 28°C | 55 mm | 335 h | 8 |
| February | 27°C | 339 mm | 254 h | 6 |
| March | 27°C | 359 mm | 286 h | 5 |
| April | 27°C | 253 mm | 265 h | 4 |
| May | 27°C | 200 mm | 302 h | 5 |
| June | 26°C | 98 mm | 320 h | 6 |
| July | 27°C | 15 mm | 350 h | 6 |
| August | 27°C | 3 mm | 356 h | 7 |
| September | 27°C | 2 mm | 338 h | 9 |
| October | 27°C | 9 mm | 357 h | 9 |
| November | 28°C | 8 mm | 350 h | 9 |
| December | 28°C | 46 mm | 346 h | 9 |
About 3,859 hours of sun a year. Roughly 130 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 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.