Siena, Tuscany, Italy Climate Change Severity

52
High
The current climate change severity in Siena is High, with a 12.7% worsening in the climate score compared to last 16 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Jun. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Siena Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), Siena temperature has changed by around +7.6%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jun. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
4660
30.4%
cloudyCloudy
4117
-58.5%
rainyRainy
8067
-16.2%
snowySnowy
10
-100%
mistyMisty
02
100%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 16 years, Siena has experienced measurable shifts in key climate parameters, contributing to the current severity score of 52 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

52/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Siena experienced significant changes:

Temperature change of

+0.89 °C

Variation in annual rainfall

+14.08 %

Change in average humidity

-5.68 %

PM2.5 levels surged by

+54.16 %

Heatwave changed by

+2 Days

Coldwave changed by

-2 Days

Wind speeds changed by

+1.27 km/h

These indicators show that Siena is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.

Check how we calculate Climate Change Severity
Based on data from Jan. to Jun.

Siena Weather Forecast 30 Days (July - August 2026)
Siena, Tuscany, Italy

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Thu. 30, Jul.
sunnySunny
Temperature Icon33°/24°
Humidity Icon51%
Wind Icon27km/h
Fri. 31, Jul.
sunnySunny
Temperature Icon34°/24°
Humidity Icon51%
Wind Icon27km/h
Sat. 1, Aug.
sunnySunny
Temperature Icon34°/23°
Humidity Icon51%
Wind Icon26.3km/h
Sun. 2, Aug.
sunnySunny
Temperature Icon33°/23°
Humidity Icon56%
Wind Icon25.9km/h
Mon. 3, Aug.
sunnySunny
Temperature Icon31°/23°
Humidity Icon60%
Wind Icon22.3km/h
Tue. 4, Aug.
sunnySunny
Temperature Icon31°/23°
Humidity Icon68%
Wind Icon19.4km/h
Wed. 5, Aug.
sunnySunny
Temperature Icon32°/22°
Humidity Icon64%
Wind Icon20.2km/h
Thu. 6, Aug.
sunnySunny
Temperature Icon33°/23°
Humidity Icon52%
Wind Icon23km/h
Fri. 7, Aug.
patchy rain possibleRain Possible
Temperature Icon31°/21°
Humidity Icon62%
Wind Icon19.3km/h
Sat. 8, Aug.
patchy rain possibleRain Possible
Temperature Icon31°/21°
Humidity Icon62%
Wind Icon18.4km/h
Sun. 9, Aug.
patchy rain possibleRain Possible
Temperature Icon31°/21°
Humidity Icon63%
Wind Icon18.3km/h
Mon. 10, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon31°/21°
Humidity Icon63%
Wind Icon18.3km/h
Tue. 11, Aug.
patchy rain possibleRain Possible
Temperature Icon31°/21°
Humidity Icon59%
Wind Icon16.9km/h
Wed. 12, Aug.
moderate rain at timesRain
Temperature Icon31°/21°
Humidity Icon58%
Wind Icon17.2km/h
Thu. 13, Aug.
heavy rain at timesHeavy Rain
Temperature Icon30°/21°
Humidity Icon63%
Wind Icon17.7km/h
Fri. 14, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon30°/21°
Humidity Icon64%
Wind Icon18.3km/h
Sat. 15, Aug.
moderate rain at timesRain
Temperature Icon30°/20°
Humidity Icon65%
Wind Icon17.2km/h
Sun. 16, Aug.
patchy rain possibleRain Possible
Temperature Icon30°/21°
Humidity Icon64%
Wind Icon17.6km/h
Mon. 17, Aug.
patchy rain possibleRain Possible
Temperature Icon30°/21°
Humidity Icon63%
Wind Icon16.6km/h
Tue. 18, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon30°/21°
Humidity Icon64%
Wind Icon15.9km/h
Wed. 19, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon30°/21°
Humidity Icon66%
Wind Icon16.2km/h
Thu. 20, Aug.
heavy rain at timesHeavy Rain
Temperature Icon31°/21°
Humidity Icon65%
Wind Icon17.9km/h
Fri. 21, Aug.
heavy rain at timesHeavy Rain
Temperature Icon31°/21°
Humidity Icon61%
Wind Icon16.9km/h
Sat. 22, Aug.
patchy rain possibleRain Possible
Temperature Icon31°/21°
Humidity Icon59%
Wind Icon16.2km/h
Sun. 23, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon30°/21°
Humidity Icon64%
Wind Icon16.7km/h
Mon. 24, Aug.
heavy rain at timesHeavy Rain
Temperature Icon30°/21°
Humidity Icon66%
Wind Icon17.4km/h
Tue. 25, Aug.
patchy rain possibleRain Possible
Temperature Icon30°/21°
Humidity Icon66%
Wind Icon16.3km/h
Wed. 26, Aug.
patchy rain possibleRain Possible
Temperature Icon30°/20°
Humidity Icon65%
Wind Icon16.9km/h
Thu. 27, Aug.
patchy rain possibleRain Possible
Temperature Icon30°/20°
Humidity Icon67%
Wind Icon18.4km/h
Fri. 28, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon29°/20°
Humidity Icon67%
Wind Icon18.8km/h
Sat. 29, Aug.
heavy rain at timesHeavy Rain
Temperature Icon29°/20°
Humidity Icon67%
Wind Icon17.6km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onFri. 31, Jul.

34°C

Low will be onSat. 15, Aug.

20°C

HumidityHumidity

High will be onTue. 4, Aug.

68%

Low will be onThu. 30, Jul.

51%

Wind SpeedWind Speed

High will be onThu. 30, Jul.

27km/h

Low will be onTue. 18, Aug.

15.9km/h

PrecipitationPrecipitation

High will be onTue. 18, Aug.

1.8mm

Low will be onFri. 7, Aug.

0.02mm

Ultraviolet IndexUV

High will be onFri. 31, Jul.

8.8

Low will be onWed. 26, Aug.

5

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