Weather in Siena: May
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Average day temperature: | 69.4°F |
| Average night temperature: | 51.0°F | |
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Number of sunny days: | 16 days |
| Day length: | 14.1 - 15.1 hours | |
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Number of rainy days: | 5 days |
| Precipitation totals: | 2.1 in. | |
| more information | ||
14 days
forecast
forecast
| Siena |
weather in
June
June
| Siena |
Air temperature in May, °F
Show year:
2026
2025
2024
The highest day temperature during May of 2026 was 86°F. At the same time the lowest night temperature was 39°F. Daily and nightly averages during May were 69.1°F and 50.0°F.
Sunny, partly cloudy and cloudy days
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Siena in May is 1.9 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 5.4 mph
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 May is: 9.0.
Best time for vacation in Siena
Siena on a weather map
Places in Italy:
Name
°F
24 Hours Forecast
Siena
Local time: 18:35
May 26, tuesday
2100
70°F
NE
2 mph
2 mph
May 27, wednesday
0000
64°F
SE
1 mph
1 mph
0300
63°F
S
2 mph
2 mph
0600
61°F
S
2 mph
2 mph
0900
75°F
SE
2 mph
2 mph
1200
84°F
SE
6 mph
6 mph
1500
88°F
SE
11 mph
11 mph
1800
81°F
SE
12 mph
12 mph
