Siena Weather Year-Round — Best Time to Visit
Siena, Italy has mild weather year-round. The best time to visit is July (score: 94/100). Annual average high: 18.6°C, total rainfall: 831mm.
When is the best time to visit Siena?
94
July is the best month to visit Siena with a travel score of 94/100 (Excellent).
Expect highs of 29.8°C, 5 rain days, and 13.9 hours of daily sunshine.
View July weather details →Travel Score by Month
54
Jan
59
Feb
67
Mar
71
Apr
79
May
90
Jun
94
Jul
92
Aug
85
Sep
72
Oct
58
Nov
52
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Siena each month?
18.6°C
Avg High
8.7°C
Avg Low
831mm
Annual Rain
How much rain does Siena get?
Siena receives 831mm of rain annually. The wettest month is typically November with 112mm, while July is the driest.
What is the weather like each month in Siena?
January
54
9°C
Low: 1°C
8 rain days
Mixed
February
59
10°C
Low: 1°C
8 rain days
Mixed
March
67
14°C
Low: 4°C
9 rain days
Good
April
71
17°C
Low: 6°C
10 rain days
Good
May
79
21°C
Low: 11°C
10 rain days
Good
June
90
26°C
Low: 15°C
7 rain days
Excellent
July
Best time to visit94
30°C
Low: 18°C
5 rain days
Excellent
August
92
30°C
Low: 18°C
6 rain days
Excellent
September
85
24°C
Low: 14°C
9 rain days
Excellent
October
72
19°C
Low: 10°C
9 rain days
Good
November
58
14°C
Low: 6°C
11 rain days
Mixed
December
52
10°C
Low: 2°C
10 rain days
Mixed
Compare Siena
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What cities are near Siena?
Data based on 1994–2024 averages · Last updated: 2024-12-31