Saint Denis, Reunion General , Reunion Climate Change Severity

57
High
The current climate change severity in Saint Denis is High, with a 25.9% worsening in the climate score compared to last 15 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Jul. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Saint Denis Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), Saint Denis temperature has changed by around +1.2%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jul. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
91
-88.8%
cloudyCloudy
233
-86.9%
rainyRainy
168162
-3.5%
snowySnowy
00
0%
mistyMisty
00
0%

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

Climate Change Indicators:

Over the past 15 years, Saint Denis 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 2025, Saint Denis experienced significant changes:

Temperature change of

+0.2 °C

Variation in annual rainfall

-28.3 %

Change in average humidity

-6.3 %

PM2.5 levels surged by

-41.06 %

Heatwave changed by

-0.2 day(s)

Coldwave changed by

-8.6 day(s)

Wind speeds changed by

+3.5 km/h

These indicators show that Saint Denis 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 Jul.

Saint Denis Weather Forecast 30 Days (August - September 2025)
Saint Denis, Reunion General , Reunion

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Sun. 3, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon22°/16°
Humidity Icon75%
Wind Icon11km/h
Mon. 4, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/16°
Humidity Icon71%
Wind Icon18km/h
Tue. 5, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/16°
Humidity Icon69%
Wind Icon31km/h
Wed. 6, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/15°
Humidity Icon70%
Wind Icon29km/h
Thu. 7, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/15°
Humidity Icon71%
Wind Icon21km/h
Fri. 8, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/15°
Humidity Icon71%
Wind Icon18km/h
Sat. 9, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon22°/17°
Humidity Icon74%
Wind Icon16km/h
Sun. 10, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/16°
Humidity Icon80%
Wind Icon27km/h
Mon. 11, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/15°
Humidity Icon69%
Wind Icon28km/h
Tue. 12, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/15°
Humidity Icon72%
Wind Icon26km/h
Wed. 13, Aug.
partly cloudyPartly Cloudy
Temperature Icon22°/15°
Humidity Icon72%
Wind Icon26km/h
Thu. 14, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon22°/16°
Humidity Icon73%
Wind Icon21km/h
Fri. 15, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon22°/16°
Humidity Icon75%
Wind Icon14km/h
Sat. 16, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon22°/16°
Humidity Icon71%
Wind Icon10km/h
Sun. 17, Aug.
moderate rain at timesModerate rain at times
Temperature Icon23°/19°
Humidity Icon78%
Wind Icon16km/h
Mon. 18, Aug.
moderate rain at timesModerate rain at times
Temperature Icon23°/20°
Humidity Icon79%
Wind Icon17km/h
Tue. 19, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon23°/20°
Humidity Icon80%
Wind Icon18km/h
Wed. 20, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon23°/20°
Humidity Icon79%
Wind Icon17km/h
Thu. 21, Aug.
moderate rain at timesModerate rain at times
Temperature Icon23°/20°
Humidity Icon78%
Wind Icon16km/h
Fri. 22, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon23°/20°
Humidity Icon78%
Wind Icon15km/h
Sat. 23, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon23°/19°
Humidity Icon79%
Wind Icon16km/h
Sun. 24, Aug.
moderate rain at timesModerate rain at times
Temperature Icon23°/20°
Humidity Icon79%
Wind Icon16km/h
Mon. 25, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon23°/20°
Humidity Icon81%
Wind Icon16km/h
Tue. 26, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/19°
Humidity Icon80%
Wind Icon17km/h
Wed. 27, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/20°
Humidity Icon79%
Wind Icon18km/h
Thu. 28, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/20°
Humidity Icon80%
Wind Icon17km/h
Fri. 29, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon23°/20°
Humidity Icon81%
Wind Icon18km/h
Sat. 30, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon23°/20°
Humidity Icon80%
Wind Icon18km/h
Sun. 31, Aug.
moderate rain at timesModerate rain at times
Temperature Icon23°/20°
Humidity Icon79%
Wind Icon17km/h
Mon. 1, Sep.
moderate rain at timesModerate rain at times
Temperature Icon23°/20°
Humidity Icon79%
Wind Icon18km/h
Tue. 2, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon23°/20°
Humidity Icon78%
Wind Icon17km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onThu. 21, Aug.

23.2°C

Low will be onMon. 11, Aug.

14.8°C

HumidityHumidity

High will be onMon. 25, Aug.

81%

Low will be onTue. 5, Aug.

69%

Wind SpeedWind Speed

High will be onTue. 5, Aug.

30.6km/h

Low will be onSat. 16, Aug.

10.1km/h

PrecipitationPrecipitation

High will be onThu. 28, Aug.

4.3mm

Low will be onFri. 8, Aug.

0.07mm

Ultraviolet IndexUV

High will be onWed. 13, Aug.

6

Low will be onMon. 4, Aug.

1.2

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