Porto Alegre, Rio Grande do Sul, Brazil Climate Change Severity

43
High
The current climate change severity in Porto Alegre is High, with a 5.1% improvement in the climate score compared to last 15 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Aug. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Porto Alegre 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), Porto Alegre temperature has changed by around +1.5%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
6552
-20%
cloudyCloudy
5537
-32.7%
rainyRainy
126101
-19.8%
snowySnowy
00
0%
mistyMisty
010
100%

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

Climate Change Indicators:

Over the past 15 years, Porto Alegre has experienced measurable shifts in key climate parameters, contributing to the current severity score of 43 (within the High severity category). While the score remains High, certain factors have improved over time. Here’s a breakdown of the specific changes observed:

Severity Score

43/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Porto Alegre experienced significant changes:

Temperature change of

+0.3 °C

Variation in annual rainfall

-17.2 %

Change in average humidity

-4.8 %

PM2.5 levels surged by

+54.6 %

Heatwave changed by

+4.2 day(s)

Coldwave changed by

-2.7 day(s)

Wind speeds changed by

-1.2 km/h

These indicators show improvement in key parametes of climate, but Porto Alegre remains in the High severity category. Continuous focus on climate resilience is necessary to avoid further worsening and ensure sustainability.

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

Porto Alegre Weather Forecast 30 Days (September - October 2025)
Porto Alegre, Rio Grande do Sul, Brazil

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Tue. 30, Sep.
moderate rainModerate rain
Temperature Icon21°/16°
Humidity Icon93%
Wind Icon10km/h
Wed. 1, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon19°/18°
Humidity Icon96%
Wind Icon16km/h
Thu. 2, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon24°/18°
Humidity Icon86%
Wind Icon11km/h
Fri. 3, Oct.
moderate rainModerate rain
Temperature Icon20°/18°
Humidity Icon93%
Wind Icon11km/h
Sat. 4, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon31°/17°
Humidity Icon75%
Wind Icon10km/h
Sun. 5, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon24°/20°
Humidity Icon80%
Wind Icon10km/h
Mon. 6, Oct.
moderate rainModerate rain
Temperature Icon16°/14°
Humidity Icon92%
Wind Icon21km/h
Tue. 7, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon19°/12°
Humidity Icon70%
Wind Icon12km/h
Wed. 8, Oct.
sunnySunny
Temperature Icon19°/11°
Humidity Icon61%
Wind Icon17km/h
Thu. 9, Oct.
sunnySunny
Temperature Icon21°/10°
Humidity Icon62%
Wind Icon27km/h
Fri. 10, Oct.
sunnySunny
Temperature Icon22°/15°
Humidity Icon57%
Wind Icon28km/h
Sat. 11, Oct.
sunnySunny
Temperature Icon23°/13°
Humidity Icon62%
Wind Icon22km/h
Sun. 12, Oct.
overcastOvercast
Temperature Icon23°/12°
Humidity Icon68%
Wind Icon12km/h
Mon. 13, Oct.
partly cloudyPartly Cloudy
Temperature Icon23°/16°
Humidity Icon74%
Wind Icon18km/h
Tue. 14, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/15°
Humidity Icon79%
Wind Icon18km/h
Wed. 15, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/15°
Humidity Icon80%
Wind Icon18km/h
Thu. 16, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/16°
Humidity Icon79%
Wind Icon18km/h
Fri. 17, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/16°
Humidity Icon78%
Wind Icon17km/h
Sat. 18, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/15°
Humidity Icon77%
Wind Icon17km/h
Sun. 19, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/15°
Humidity Icon77%
Wind Icon18km/h
Mon. 20, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon26°/15°
Humidity Icon74%
Wind Icon19km/h
Tue. 21, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/15°
Humidity Icon79%
Wind Icon18km/h
Wed. 22, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/15°
Humidity Icon76%
Wind Icon18km/h
Thu. 23, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/16°
Humidity Icon75%
Wind Icon17km/h
Fri. 24, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/16°
Humidity Icon77%
Wind Icon18km/h
Sat. 25, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/16°
Humidity Icon75%
Wind Icon19km/h
Sun. 26, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon27°/16°
Humidity Icon74%
Wind Icon18km/h
Mon. 27, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/15°
Humidity Icon76%
Wind Icon21km/h
Tue. 28, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon26°/16°
Humidity Icon74%
Wind Icon18km/h
Wed. 29, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon28°/16°
Humidity Icon73%
Wind Icon17km/h
Thu. 30, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon28°/17°
Humidity Icon76%
Wind Icon21km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 4, Oct.

30.5°C

Low will be onThu. 9, Oct.

10.3°C

HumidityHumidity

High will be onWed. 1, Oct.

96%

Low will be onFri. 10, Oct.

57%

Wind SpeedWind Speed

High will be onFri. 10, Oct.

28.1km/h

Low will be onSun. 5, Oct.

9.7km/h

PrecipitationPrecipitation

High will be onTue. 30, Sep.

10.7mm

Low will be onWed. 8, Oct.

0.01mm

Ultraviolet IndexUV

High will be onSat. 4, Oct.

6

Low will be onFri. 3, Oct.

0.1

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