Siena weather live forecast

Today's maximum temperature in Siena is expected to be 18°C. Select a day from the live weather forecast for Siena, Tuscany, Italy for more weather parameters.

Tuesday
19th May
18

12

6

UV6
Wednesday
20th May
23

12

10

UV7
Thursday
21st May
25

13

12

UV7
Friday
22nd May
25

15

13

UV9
Saturday
23rd May
27

14

14

UV8

5-day weather forecast updated at 04:01 on Tuesday 19th May 2026 GMT

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The 5-day weather forecast for Tuscany (Siena) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Siena weather forecast by day

Below are the detailed weather forecasts for Siena for the next 5 days.

Siena weather for Tuesday 19th May 2026

Expect sunshine and showers in Siena, Tuscany with a maximum temperature of 18°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 13% chance of some rain and a light breeze of 10 kph from the west.

18
°C maximum temperature
12
°C minimum temperature
sunshine and showers
6
hours of sunshine
UV6
UV index (High)
13
% chance of some rain
<2
mm of rainfall expected
18
°C wind chill
10
kph wind from W

Siena weather for Wednesday 20th May 2026

Expect broken clouds in Siena, Tuscany with a maximum temperature of 23°C, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-west.

23
°C maximum temperature
12
°C minimum temperature
broken clouds
10
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
23
°C wind chill
8
kph wind from NW

Siena weather for Thursday 21st May 2026

Expect scattered clouds in Siena, Tuscany with a maximum temperature of 25°C, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-east.

25
°C maximum temperature
13
°C minimum temperature
scattered clouds
12
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
25
°C wind chill
8
kph wind from NE

Siena weather for Friday 22nd May 2026

Expect clear skies in Siena, Tuscany with a maximum temperature of 25°C, maximum UV of 9 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-east.

25
°C maximum temperature
15
°C minimum temperature
clear skies
13
hours of sunshine
UV9
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
9
kph wind from NE

Siena weather for Saturday 23rd May 2026

Expect clear skies in Siena, Tuscany with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-east.