Siena weather in May 2025

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Siena in May. Check more long-term weather averages for Siena in May before you book your next holiday to Tuscany in 2025/2026.

  • 21°C maximum daytime temperature in May in Siena21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in May in Siena12
    12 days with some rainfall
  • 11°C minimum night-time temperature in May in Siena11
    11°C min night temperature
  • 15 hours of daylight per day in May in Siena15
    15 hours of daylight per day
  • No heat & humidity in May in Siena0
    No heat & humidity
  • 58 mm monthly rainfall in May in Siena58
    58 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Siena7
    7 (High) UV index

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The May weather guide for Tuscany (Siena) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Tuscany

How hot is it in Siena in May?

Daytime temperatures usually reach 21°C in Siena in May, falling to 11°C at night.

How sunny is it in Siena in May?

There are normally 7 hours of bright sunshine each day in Siena in May - that's 49% of daylight hours.

Does it rain in Siena in May?

There are usually 12 days with some rain in Siena in May and the average monthly rainfall is 58mm.

Siena May sunrise & sunset times

Browse the sunrise and sunset times for Siena in May 2025. Select a month to view Siena sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:08 19:17
Friday, 16th May 2025 04:49 19:33
Saturday, 31st May 2025 04:38 19:48

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