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Siena

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Siena Weather and climate

Data source:Meteostat
Update date:2025-09

Siena year round climate
  • Spring (March–May): Average 50–60°F, 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 68–79°F, 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 49–65°F, 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 41–48°F, 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. 58.6°F / Annual rainfall: approx. 35 mm / Summer humidity: 50%–60% / Rainiest month: October

Siena monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
43.5°F
1.8
February
48.4°F
4.1
March
50.5°F
4.1
April
54.9°F
2.8
May
60.3°F
4.2
June
68.7°F
1
July
79.5°F
0.2
August
79.5°F
1.6
September
65.7°F
6.4
October
60.6°F
6.5
November
49.6°F
0.6
December
41.9°F
2.2
Siena weather for the next seven days
10/22
Wednesday
Moderate rain
66.1°F/54.8°F
10/23
Thursday
Moderate rain
67.6°F/55°F
10/24
Friday
Patchy rain nearby
63.8°F/50.3°F
10/25
Saturday
Patchy rain nearby
61.7°F/55.3°F
10/26
Sunday
Heavy rain
67.4°F/55.5°F
10/27
Monday
Moderate rain
57.9°F/47.5°F
10/28
Tuesday
Sunny
58.6°F/43.1°F