Yearly weather and climate in Siena, Italy
The yearly weather in Siena runs from around 2°C in January to 33°C in July. July is the driest month at 4 rainy days; December the wettest at 12. Here is the annual climate data, so you know what you are packing for.
Best time to visit
The best weather is typically in Jun, Jul, Aug, Sep, with mild temperatures and lower rainfall.
Sunshine
Expect up to 14 hours of clear skies in Jul, but only 5.7 hours in Dec. Pack sunglasses and SPF accordingly.
Rainfall
Rainfall peaks in Oct (113mm), but it's generally moderate. A light travel umbrella should be enough.
Day-to-night swings
Temperatures typically drop by 11°C from day to night. Make sure to pack layers for the evenings.
Average temperatures and rainfall
Daily highs and lows in Siena, averaged over 10 years of recorded weather, with the number of days it typically rains.
- 1050°236°9Jan
- 1355°438°7Feb
- 1558°440°8Mar
- 1864°644°10Apr
- 2373°1253°11May
- 2883°1661°7Jun
- 3391°1966°4Jul
- 3290°1966°6Aug
- 2679°1559°8Sep
- 2169°1253°9Oct
- 1559°744°10Nov
- 1152°438°12Dec
Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Jul is typically driest at 4 days (16mm); Dec the wettest at 12 days (109mm).
| Month | Average high | Average low | Rainy days | Total rainfall |
|---|---|---|---|---|
| Jan | 10°C | 2°C | 9 | 60mm |
| Feb | 13°C | 4°C | 7 | 51mm |
| Mar | 15°C | 4°C | 8 | 66mm |
| Apr | 18°C | 6°C | 10 | 71mm |
| May | 23°C | 12°C | 11 | 73mm |
| Jun | 28°C | 16°C | 7 | 56mm |
| Jul | 33°C | 19°C | 4 | 16mm |
| Aug | 32°C | 19°C | 6 | 45mm |
| Sep | 26°C | 15°C | 8 | 90mm |
| Oct | 21°C | 12°C | 9 | 113mm |
| Nov | 15°C | 7°C | 10 | 84mm |
| Dec | 11°C | 4°C | 12 | 109mm |
Weather data by Open-Meteo.com
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