Rennes, Bretagne, France Climate Change Severity

67
Very High
The current climate change severity in Rennes is Very High, with a 38.3% 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 Feb. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (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 +26.4%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
60
-100%
cloudyCloudy
102
-80%
rainyRainy
3024
-20%
snowySnowy
03
100%
mistyMisty
02
100%

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 67 (within the Very High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

67/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Rennes experienced significant changes:

Temperature change of

+2 °C

Variation in annual rainfall

+61.5 %

Change in average humidity

+2.7 %

PM2.5 levels surged by

-40.3 %

Heatwave changed by

+2 day(s)

Coldwave changed by

-1.1 day(s)

Wind speeds changed by

+4.4 km/h

These indicators show a dramatic increase in volatility and worsening conditions. Rennes's Very High severity status requires urgent and immediate adaptation and mitigation strategies, particularly focused on managing extreme weather events, improving air quality, and ensuring water resources are adequate for the population.

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

Rennes Weather Forecast 30 Days (March - April 2026)
Rennes, Bretagne, France

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Sat. 7, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon16°/9°
Humidity Icon90%
Wind Icon12.2km/h
Sun. 8, Mar.
mistMist
Temperature Icon16°/8°
Humidity Icon87%
Wind Icon19.1km/h
Mon. 9, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon14°/7°
Humidity Icon89%
Wind Icon14km/h
Tue. 10, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon13°/6°
Humidity Icon88%
Wind Icon25.6km/h
Wed. 11, Mar.
moderate rainModerate rain
Temperature Icon12°/5°
Humidity Icon82%
Wind Icon32.4km/h
Thu. 12, Mar.
sunnySunny
Temperature Icon12°/3°
Humidity Icon80%
Wind Icon13.3km/h
Fri. 13, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon13°/4°
Humidity Icon85%
Wind Icon24.5km/h
Sat. 14, Mar.
partly cloudyPartly Cloudy
Temperature Icon16°/7°
Humidity Icon88%
Wind Icon25.9km/h
Sun. 15, Mar.
overcastOvercast
Temperature Icon12°/8°
Humidity Icon82%
Wind Icon20.2km/h
Mon. 16, Mar.
moderate rainModerate rain
Temperature Icon10°/7°
Humidity Icon93%
Wind Icon19.1km/h
Tue. 17, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon10°/7°
Humidity Icon94%
Wind Icon23km/h
Wed. 18, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon11°/3°
Humidity Icon89%
Wind Icon20.5km/h
Thu. 19, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon11°/3°
Humidity Icon87%
Wind Icon15.5km/h
Fri. 20, Mar.
partly cloudyPartly Cloudy
Temperature Icon13°/3°
Humidity Icon81%
Wind Icon13.7km/h
Sat. 21, Mar.
heavy rain at timesHeavy rain at times
Temperature Icon13°/4°
Humidity Icon82%
Wind Icon20.5km/h
Sun. 22, Mar.
heavy rain at timesHeavy rain at times
Temperature Icon13°/4°
Humidity Icon83%
Wind Icon21.6km/h
Mon. 23, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/4°
Humidity Icon82%
Wind Icon19.4km/h
Wed. 25, Mar.
moderate rain at timesModerate rain at times
Temperature Icon14°/5°
Humidity Icon82%
Wind Icon20.9km/h
Thu. 26, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/5°
Humidity Icon82%
Wind Icon22.3km/h
Fri. 27, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/4°
Humidity Icon83%
Wind Icon19.8km/h
Sat. 28, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/5°
Humidity Icon83%
Wind Icon25.2km/h
Sun. 29, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/5°
Humidity Icon83%
Wind Icon22.7km/h
Mon. 30, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/5°
Humidity Icon83%
Wind Icon22.3km/h
Tue. 31, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/5°
Humidity Icon81%
Wind Icon25.2km/h
Wed. 1, Apr.
moderate rain at timesModerate rain at times
Temperature Icon14°/5°
Humidity Icon78%
Wind Icon22.3km/h
Thu. 2, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/5°
Humidity Icon81%
Wind Icon22km/h
Sun. 5, Apr.
heavy rain at timesHeavy rain at times
Temperature Icon14°/5°
Humidity Icon83%
Wind Icon19.4km/h
Mon. 6, Apr.
heavy rain at timesHeavy rain at times
Temperature Icon15°/6°
Humidity Icon81%
Wind Icon22.3km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 7, Mar.

16°C

Low will be onThu. 12, Mar.

3°C

HumidityHumidity

High will be onTue. 17, Mar.

94%

Low will be onWed. 1, Apr.

78%

Wind SpeedWind Speed

High will be onWed. 11, Mar.

32.4km/h

Low will be onSat. 7, Mar.

12.2km/h

PrecipitationPrecipitation

High will be onWed. 11, Mar.

8.3mm

Low will be onFri. 20, Mar.

0.01mm

Ultraviolet IndexUV

High will be onSat. 14, Mar.

4

Low will be onMon. 9, Mar.

2

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