Ostuni weather by month
Ostuni runs from about 10°C in January to 28°C in July, with December the wettest month at 90 mm.
warmest month
July
28°C
coolest month
January
10°C
wettest month
December
90 mm
worst air month
March
12 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 10°C | 42 mm | 231 h | 8 |
| February | 11°C | 82 mm | 242 h | 8 |
| March | 12°C | 60 mm | 295 h | 12 |
| April | 15°C | 45 mm | 332 h | 11 |
| May | 19°C | 46 mm | 385 h | 7 |
| June | 25°C | 22 mm | 407 h | 8 |
| July | 28°C | 5 mm | 426 h | 7 |
| August | 28°C | 24 mm | 393 h | 7 |
| September | 22°C | 73 mm | 316 h | 5 |
| October | 18°C | 52 mm | 295 h | 5 |
| November | 13°C | 51 mm | 241 h | 7 |
| December | 10°C | 90 mm | 215 h | 11 |
About 3,778 hours of sun a year. Roughly 59 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 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.