Siena Weather & Climate: Best Time to Visit

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

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

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