Weather in Siena: December
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Average day temperature: | 49.6°F |
| Average night temperature: | 40.7°F | |
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Number of sunny days: | 13 days |
| Day length: | 9.0 - 9.2 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.7 in. | |
| more information | ||
14 days
forecast
forecast
| Siena |
weather in
January
January
| Siena |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 57°F. At the same time the lowest night temperature was 34°F. Daily and nightly averages during December were 51.8°F and 42.7°F.
Sunny, partly cloudy and cloudy days
Mostly all days in December are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Siena in December is 1.8 in. Other months of the year show relatively similar values.
Wind speed in December, mph
The average wind speed value in December is 4.5 mph It makes December lest windy month of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 4.8.
Best time for vacation in Siena
Siena on a weather map
Places in Italy:
Name
°F
24 Hours Forecast
Siena
Local time: 18:04
December 29, monday
2100
37°F
N
2 mph
2 mph
December 30, tuesday
0000
36°F
N
2 mph
2 mph
0300
36°F
NW
2 mph
2 mph
0600
36°F
NW
2 mph
2 mph
0900
39°F
NW
4 mph
4 mph
1200
43°F
W
2 mph
2 mph
1500
43°F
W
2 mph
2 mph
1800
41°F
SW
2 mph
2 mph
