Siena Weather

Siena Average Weather & Yearly Climate

The average weather in Siena is generally around 17 degrees although it changes during the year.

Commonly July is when its the hottest and January is the coldest period of the year. Temperatures differ by 18. Expect average temperatures to be 16 in Spring, 26 during Summer (June to Aug) and 18 throughout Autumn and about 9 in Winter.

Month Degrees Celsius
January 9
February 9
March 12
April 15
May 20
June 23
July 27
August 27
September 23
October 19
November 13
December 9


What are the Weather Insights, Yearly Temperature, Climate in Siena?

Our weather insights helps decide the best time to go and visit Siena

  • Typical Average Daily Temperature: 17
  • Typical Hottest Month: July
  • Typical Coldest Month: January
  • Average Spring Temperature: 16
  • Average Summer Temperature: 26
  • Average Autumn Temperature: 18
  • Average Winter Temperature: 9