What is the weather like in Siena right now?
It is currently 32°C in Siena with clear and sunny. It feels like 30°C, humidity is 22% and the wind is W 19 km/h.
Today (Saturday) reaches a maximum of 32°C and a minimum of 19°C, with 0.2 mm of rain and 12.8 hours of sunshine. Sunrise is at 06:35 and sunset at 19:55.
Siena weather tomorrow
Tomorrow (Sunday) the maximum temperature in Siena is 31°C and the minimum 16°C. Around 0 mm of rain is expected with 12.7 hours of sunshine, and the chance of rain is 0%. The data is refreshed several times a day through Open-Meteo.
Siena weather this week and next week
Over the coming week the average maximum temperature in Siena sits around 32°C and the average minimum around 17°C. Roughly 0.2 mm of rain is expected, spread across 0 days, with 1 largely sunny day.
The warmest day in the 14 day forecast for Siena is Friday 4 Sept at 34°C. The coldest night falls on Sunday 30 Aug at 16°C. Click any day for hourly detail.
Rain, sunshine and UV in Siena
A daily rainfall total says little on its own: the same 5 mm can be one short downpour or a grey day of drizzle, which is why the hourly chart above is often the more useful of the two. Over the next fortnight the highest UV index for Siena is 7 — high enough to warrant sun protection in the middle of the day.
How reliable is a 14 day forecast?
The first three to five days are generally very accurate. After that the certainty drops off and it is better read as a trend than as an exact daily prediction. Our data comes from Open-Meteo, which combines national weather models — among them the Met Office, DWD and ECMWF — and recomputes them several times a day using measurements from stations worldwide.
Forecast for Siena last updated: 29 August 2026 at 14:25. See also all Italy forecasts and the European weather map.