Siena weather live forecast

Today's maximum temperature in Siena is expected to be 26°C. Select a day from the live weather forecast for Siena, Tuscany, Italy for more weather parameters.

Thursday
17th Sep
26

19

5

5
Friday
18th Sep
24

19

4

4
Saturday
19th Sep
26

17

8

5
Sunday
20th Sep
27

17

12

6
Monday
21st Sep
29

17

9

6

5-day weather forecast updated at 04:01 on Thursday 17th September 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 Thursday 17th September 2026

Expect isolated thunderstorms in Siena, Tuscany with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 47% chance of some rain and a light breeze of 12 kph from the south-west.

26
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
5
UV index (Moderate)
47
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
12
kph wind from SW

Siena weather for Friday 18th September 2026

Expect isolated thunderstorms in Siena, Tuscany with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 70% chance of some rain and little or no wind of 6 kph from the north-west.

24
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
4
UV index (Moderate)
70
% chance of some rain
<5
mm of rainfall expected
24
°C wind chill
6
kph wind from NW

Siena weather for Saturday 19th September 2026

Expect broken clouds in Siena, Tuscany with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the east.

26
°C maximum temperature
17
°C minimum temperature
broken clouds
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
6
kph wind from E

Siena weather for Sunday 20th September 2026

Expect clear skies in Siena, Tuscany with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the north-west.

27
°C maximum temperature
17
°C minimum temperature
clear skies
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
7
kph wind from NW

Siena weather for Monday 21st September 2026

Expect scattered clouds in Siena, Tuscany with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-west.