Fernando de Noronha weather by month
Fernando de Noronha runs from about 25°C in September to 28°C in January, with April the wettest month at 480 mm.
warmest month
January
28°C
coolest month
September
25°C
wettest month
April
480 mm
worst air month
September
10 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 28°C | 11 mm | 360 h | 8 |
| February | 27°C | 147 mm | 318 h | 7 |
| March | 27°C | 415 mm | 292 h | 6 |
| April | 28°C | 480 mm | 256 h | 4 |
| May | 28°C | 176 mm | 346 h | 6 |
| June | 27°C | 68 mm | 348 h | 7 |
| July | 26°C | 39 mm | 352 h | 7 |
| August | 26°C | 23 mm | 361 h | 8 |
| September | 25°C | 20 mm | 355 h | 10 |
| October | 26°C | 6 mm | 371 h | 9 |
| November | 26°C | 8 mm | 359 h | 8 |
| December | 27°C | 43 mm | 361 h | 8 |
About 4,079 hours of sun a year. Roughly 115 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.