Siena Weather & Climate: Best Time to Visit
Siena has a warm maritime climate that is strongly influenced by the Mediterranean sea. Due to this influence the weather is very stable. This means summer and winter temperatures are not very far apart and it rarely gets really hot or extremely cold. Rainfall is evenly distributed throughout the year, but in summer months the average rainfall is a bit lower. In winter months, the average daily temperature is around 10°C (50°F) .
Monthly Temperature in Siena
Depending on the time of the year, temperatures range from very warm to chilly in Siena. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 10°C (50°F) in the coolest month, January.
Nights vary from 18°C (64°F) in August to around 2°C (36°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Siena
Generally, Siena has a moderate amount of precipitation, averaging 903 mm (36 in) of rain/snowfall annually. The climate in Siena shows significant variation throughout the year. Expect high rainfall in November, the wettest month, with an average of 121 mm (4.8 in) of precipitation over 14 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 33 mm (1.3 in) of rainfall over 6 rainy days. For more details, please visit our Siena Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Siena
For those who appreciate different seasons, Siena serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.7 hours of sunshine daily, and embrace the darker days in November, offering only 3.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Siena 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Siena
During the months of April, May, June, September and October, Siena enjoys pleasant weather with average temperatures ranging from 18°C (65°F) to 27°C (81°F). These months are perfect for sightseeing and exploring.Rainfall during this time ranges from 54 mm (2.1 in) in June to 110 mm (4.3 in) in October. This means you can expect a mix of sunny days and occasional showers. Ready to plan your travels but need destination ideas? Our smart tool recommends places based on the climate conditions you prefer. Start planning with our destination weather tool.
