Weather in Porto Alegre in September
In an average September, Porto Alegre sees a daily high around 22°C and a low around 13°C, based on 1980–2026 of local climate records.
| Average high | 22°C |
|---|---|
| Typical high range | 17°C to 27°C |
| Average low | 13°C |
| Typical low range | 8°C to 17°C |
| Average daily precipitation | 5 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
36°C
1994-09-24
Lowest
11°C
2002-09-01
Low
Highest
22°C
1981-09-09
Lowest
2°C
2006-09-06
Feels-like
Highest
53°C
2019-09-09
Lowest
-2°C
2011-09-02
Humidity
Highest
20.1 g/m³
2015-09-24
Lowest
5.4 g/m³
2006-09-04
Wind
Highest
46 km/h
2005-09-02
Lowest
7 km/h
2026-09-25
Gust
Highest
86 km/h
2005-09-02
Lowest
9 km/h
2026-09-25
Precip
Wettest
367 mm
2023
Driest
39 mm
2003
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