See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Mostly Clear
Feels Like: 24°
Min: 14°
Max: 28°
The next few hours will be clear, with today reaching 28°C and dropping to 16°C. The coming days will be partly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:01
Sunrise
19:15
Sunset
Moon
Waxing Crescent
12:49
Moonrise
21:36
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
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Weather in Siena today, September 16, 2026
Siena may turn murky on September 16, 2026, with fog or mist reducing clarity at times. Early travel in particular may need extra care. Morning skies stay relatively clear, holding cloud close to 44% near 11:00. The early part of the day favours being outside.
The temperature range runs from about 14°C up to 28°C. Expect humidity between 44% and 94%, most humid near 23:00. A lighter breeze peaks around 18:00 near 3.5 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 85% around 16:00. Outdoor plans may still want a flexible backup. Expect visibility near 36.3 km, with poorer spells close to 3.1 km. Daylight runs from 07:01 to 19:15, lasting 12 hours 13 minutes of sunlight today.
The practical takeaway for Siena on September 16, 2026 is reduced clarity at times, so plan journeys with care near 28°C.
Frequently asked questions about weather in Siena
How warm does it get in Siena?
The warmest month in Siena is August, with average high temperatures of 31°C. The average temperature during this period is around 25°C.
How cold does it get in Siena?
The coldest month in Siena is January, with average low temperatures of 2°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Siena?
The wettest month in Siena is November, with an average of 125mm of precipitation.
What is the driest time of year in Siena?
The driest month in Siena is July, with an average of 28mm of precipitation.
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