Rennes, Bretagne, France Climate Change Severity

57
High
The current climate change severity in Rennes is High, with a 23.9% 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

Rennes 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), Rennes temperature has changed by around +17.3%, 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
2230
36.3%
cloudyCloudy
3816
-57.8%
rainyRainy
9286
-6.5%
snowySnowy
03
100%
mistyMisty
14
300%

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

Climate Change Indicators:

Over the past 16 years, Rennes has experienced measurable shifts in key climate parameters, contributing to the current severity score of 57 (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

57/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Rennes experienced significant changes:

Temperature change of

+1.74 °C

Variation in annual rainfall

+10.49 %

Change in average humidity

-3.97 %

PM2.5 levels surged by

-35.36 %

Heatwave changed by

+15 Days

Coldwave changed by

-2 Days

Wind speeds changed by

+3.14 km/h

These indicators show that Rennes 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.

Rennes Weather Forecast 30 Days (July - August 2026)
Rennes, Bretagne, France

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Thu. 30, Jul.
sunnySunny
Temperature Icon31°/14°
Humidity Icon67%
Wind Icon26.3km/h
Fri. 31, Jul.
sunnySunny
Temperature Icon27°/13°
Humidity Icon58%
Wind Icon24.1km/h
Sat. 1, Aug.
sunnySunny
Temperature Icon27°/10°
Humidity Icon54%
Wind Icon24.5km/h
Sun. 2, Aug.
sunnySunny
Temperature Icon34°/11°
Humidity Icon36%
Wind Icon28.4km/h
Mon. 3, Aug.
sunnySunny
Temperature Icon34°/16°
Humidity Icon38%
Wind Icon19.1km/h
Tue. 4, Aug.
sunnySunny
Temperature Icon28°/14°
Humidity Icon60%
Wind Icon18km/h
Wed. 5, Aug.
partly cloudyPartly Cloudy
Temperature Icon29°/16°
Humidity Icon72%
Wind Icon20.5km/h
Thu. 6, Aug.
partly cloudyPartly Cloudy
Temperature Icon22°/15°
Humidity Icon83%
Wind Icon12.2km/h
Fri. 7, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon25°/13°
Humidity Icon71%
Wind Icon17.4km/h
Sat. 8, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/13°
Humidity Icon74%
Wind Icon17.5km/h
Sun. 9, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/14°
Humidity Icon74%
Wind Icon19.2km/h
Mon. 10, Aug.
heavy rain at timesHeavy Rain
Temperature Icon25°/13°
Humidity Icon72%
Wind Icon20km/h
Tue. 11, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon26°/14°
Humidity Icon72%
Wind Icon17.8km/h
Wed. 12, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon25°/14°
Humidity Icon73%
Wind Icon17.4km/h
Thu. 13, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/14°
Humidity Icon75%
Wind Icon16.7km/h
Fri. 14, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/13°
Humidity Icon77%
Wind Icon16.9km/h
Sat. 15, Aug.
moderate rain at timesRain
Temperature Icon25°/14°
Humidity Icon73%
Wind Icon16.7km/h
Sun. 16, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/14°
Humidity Icon74%
Wind Icon18.2km/h
Mon. 17, Aug.
heavy rain at timesHeavy Rain
Temperature Icon24°/14°
Humidity Icon76%
Wind Icon18.2km/h
Tue. 18, Aug.
heavy rain at timesHeavy Rain
Temperature Icon24°/14°
Humidity Icon74%
Wind Icon15.2km/h
Wed. 19, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/13°
Humidity Icon77%
Wind Icon16.1km/h
Thu. 20, Aug.
moderate rain at timesRain
Temperature Icon24°/14°
Humidity Icon75%
Wind Icon16.4km/h
Fri. 21, Aug.
patchy rain possibleRain Possible
Temperature Icon24°/14°
Humidity Icon72%
Wind Icon15.6km/h
Sat. 22, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon25°/14°
Humidity Icon73%
Wind Icon17.1km/h
Sun. 23, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon25°/14°
Humidity Icon73%
Wind Icon16.8km/h
Mon. 24, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/14°
Humidity Icon73%
Wind Icon19.9km/h
Tue. 25, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon23°/14°
Humidity Icon74%
Wind Icon21.3km/h
Wed. 26, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon24°/14°
Humidity Icon76%
Wind Icon20.1km/h
Thu. 27, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon23°/13°
Humidity Icon76%
Wind Icon19.4km/h
Fri. 28, Aug.
moderate rain at timesRain
Temperature Icon24°/13°
Humidity Icon73%
Wind Icon18.8km/h
Sat. 29, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon23°/13°
Humidity Icon74%
Wind Icon19.1km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 2, Aug.

34°C

Low will be onSat. 1, Aug.

10°C

HumidityHumidity

High will be onThu. 6, Aug.

83%

Low will be onSun. 2, Aug.

36%

Wind SpeedWind Speed

High will be onSun. 2, Aug.

28.4km/h

Low will be onThu. 6, Aug.

12.2km/h

PrecipitationPrecipitation

High will be onFri. 14, Aug.

3.5mm

Low will be onTue. 4, Aug.

0.04mm

Ultraviolet IndexUV

High will be onSun. 2, Aug.

8

Low will be onFri. 7, Aug.

4

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