Lugano weather by month
Lugano runs from about 5°C in December to 26°C in August, with May the wettest month at 431 mm.
warmest month
August
26°C
coolest month
December
5°C
wettest month
May
431 mm
worst air month
March
18 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 6°C | 50 mm | 203 h | 12 |
| February | 8°C | 216 mm | 180 h | 13 |
| March | 9°C | 337 mm | 191 h | 18 |
| April | 12°C | 127 mm | 282 h | 12 |
| May | 16°C | 431 mm | 278 h | 8 |
| June | 20°C | 213 mm | 331 h | 6 |
| July | 24°C | 153 mm | 396 h | 5 |
| August | 26°C | 90 mm | 384 h | 8 |
| September | 18°C | 312 mm | 247 h | 6 |
| October | 15°C | 353 mm | 152 h | 13 |
| November | 8°C | 21 mm | 239 h | 9 |
| December | 5°C | 14 mm | 219 h | 12 |
About 3,102 hours of sun a year. Roughly 208 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.