Palermo weather by month
Palermo runs from about 13°C in January to 28°C in August, with December the wettest month at 184 mm.
warmest month
August
28°C
coolest month
January
13°C
wettest month
December
184 mm
worst air month
April
11 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 13°C | 78 mm | 235 h | 7 |
| February | 13°C | 67 mm | 247 h | 7 |
| March | 15°C | 67 mm | 323 h | 11 |
| April | 17°C | 26 mm | 319 h | 11 |
| May | 20°C | 116 mm | 361 h | 8 |
| June | 25°C | 14 mm | 397 h | 9 |
| July | 28°C | 6 mm | 429 h | 7 |
| August | 28°C | 33 mm | 386 h | 9 |
| September | 24°C | 54 mm | 317 h | 5 |
| October | 21°C | 148 mm | 280 h | 5 |
| November | 17°C | 88 mm | 264 h | 5 |
| December | 13°C | 184 mm | 243 h | 9 |
About 3,801 hours of sun a year. Roughly 89 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.