Siena weather live forecast

Today's maximum temperature in Siena is expected to be 36°C. Select a day from the live weather forecast for Siena, Tuscany, Italy for more weather parameters.

Wednesday
5th Aug
36

23

13

8
Thursday
6th Aug
36

25

12

8
Friday
7th Aug
36

23

12

8
Saturday
8th Aug
35

23

10

7
Sunday
9th Aug
35

24

11

7

5-day weather forecast updated at 04:01 on Wednesday 5th August 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 Wednesday 5th August 2026

Expect isolated thunderstorms in Siena, Tuscany with a maximum temperature of 36°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 13 hours of bright sunshine. There are 0-2 mm of rainfall expected with 11% chance of some rain and a light breeze of 8 kph from the south-west.

36
°C maximum temperature
23
°C minimum temperature
isolated thunderstorms
13
hours of sunshine
8
UV index (Very High)
11
% chance of some rain
<2
mm of rainfall expected
H
high heat & humidity
8
kph wind from SW

Siena weather for Thursday 6th August 2026

Expect isolated thunderstorms in Siena, Tuscany with a maximum temperature of 36°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0-2 mm of rainfall expected with 20% chance of some rain and a light breeze of 10 kph from the west.

36
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
12
hours of sunshine
8
UV index (Very High)
20
% chance of some rain
<2
mm of rainfall expected
H
high heat & humidity
10
kph wind from W

Siena weather for Friday 7th August 2026

Expect scattered clouds in Siena, Tuscany with a maximum temperature of 36°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

36
°C maximum temperature
23
°C minimum temperature
scattered clouds
12
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
11
kph wind from NW

Siena weather for Saturday 8th August 2026

Expect scattered clouds in Siena, Tuscany with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the north-west.

35
°C maximum temperature
23
°C minimum temperature
scattered clouds
10
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
H
high heat & humidity
7
kph wind from NW

Siena weather for Sunday 9th August 2026

Expect isolated thunderstorms in Siena, Tuscany with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0-2 mm of rainfall expected with 3% chance of some rain and a light breeze of 10 kph from the west.