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Siena

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Travel Info
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Travel Info

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Siena Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Siena year round climate

  • Spring (March–May): Average 10.3–15.7°C, mild and comfortable climate, abundant sunshine, and less rainfall. Common activities: Visiting historical buildings, strolling through the countryside, and savoring Tuscan food and wine. Recommended clothing: Light jacket, comfortable trousers or skirt, and comfortable shoes.
  • Summer (June–August): Average 20.4–26.4°C, hot and dry, strong sunshine. Common activities: Enjoying coffee at outdoor cafes, visiting museums and churches (indoor attractions), and evening walks to admire the sunset. Recommended clothing: Light and breathable clothing, sun hat, sunglasses, and sunscreen.
  • Autumn (September–November): Average 9.8–18.7°C, pleasant climate, larger temperature difference between day and night, slightly more rainfall in October. Common activities: Visiting wineries, enjoying the atmosphere of the autumn harvest, and appreciating the autumn colors. Recommended clothing: Comfortable long-sleeved shirts, light jacket, and comfortable shoes.
  • Winter (December–February): Average 5.5–9.1°C, cold and dry, occasional rainfall. Common activities: Warming up by the fireplace, visiting museums and churches (indoor attractions). Recommended clothing: Warm coat, scarf, hat, and gloves.

Siena climatological average

Annual average temperature: approx. 14.8°C / Annual rainfall: approx. 35 mm / Summer humidity: 50%–60% / Rainiest month: October

Siena monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
6.4°C
1.8
February
9.1°C
4.1
March
10.3°C
4.1
April
12.7°C
2.8
May
15.7°C
4.2
June
20.4°C
1
July
26.4°C
0.2
August
26.4°C
1.6
September
18.7°C
6.4
October
15.9°C
6.5
November
9.8°C
0.6
December
5.5°C
2.2

Siena weather for the next seven days

1/11
Sunday
Sunny
8.3°C/0°C
1/12
Monday
Partly Cloudy
7.4°C/-0.5°C
1/13
Tuesday
Overcast
10°C/1.8°C
1/14
Wednesday
Patchy rain nearby
10.5°C/5.4°C
1/15
Thursday
Patchy rain nearby
10.7°C/7.8°C
1/16
Friday
Patchy rain nearby
11.6°C/8.1°C
1/17
Saturday
Moderate rain
8.9°C/7.9°C

Siena Frequently Asked Questions and Useful Information for Travel

What is the best time to visit?

Spring and autumn are the best times to visit Siena as the weather during these two seasons is mild, making it ideal for visiting attractions and admiring the scenery.

Which attractions are must-sees?

Must-visit attractions in Siena include the ancient town of Pienza, San Gimignano and the Double Row of Cypresses. These attractions not only showcase medieval architectural styles but also provide a rich cultural experience.