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Porto Alegre weather in August

Weather in Porto Alegre: August

Average day temperature: 67.2°F
Average night temperature: 57.0°F
Sea water temperature: 61.3°F
Number of sunny days: 14 days
Day length: 10.7 - 11.5 hours
Number of rainy days: 3 days
Precipitation totals: 1.4 in.

Air temperature in August, °F

Show year:
2026
2025
2024

The highest day temperature during August of 2026 was 83°F. At the same time the lowest night temperature was 41°F. Daily and nightly averages during August were 65.2°F and 57.5°F.

Sea water temperature in Porto Alegre in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 62.8°F. The highest and lowest sea temperatures during the month were 66.0°F and 59.7°F.

Sunny, partly cloudy and cloudy days

Mostly all days in August are sunny but cloudy days are also possible.

Precipitation total in August, in.

Precipitation total value in Porto Alegre in August is 1.4 in. Other months of the year show relatively similar values.

Wind speed in August, mph

The average wind speed value in August is 5.7 mph It makes August one of the least windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 6.3.

Best time for vacation in Porto Alegre

Sunniest months:
February 15 days
March 15 days
May 15 days
Warmest months:
January 86.7 °F
February 86.6 °F
March 84.2 °F
Warmest sea temp:
February 81.1 °F
January 80.6 °F
March 79.8 °F
Coldest months:
June 64.1 °F
July 64.7 °F
August 67.2 °F
Rainiest months:
September 5 days
November 4 days
October 4 days
Windiest months:
December 7.3 mph
November 7.3 mph
January 7.2 mph

Porto Alegre on a weather map

Porto Alegre
+64°F
E 4 mph
Feels like: +64°F
Precip.: 5%
Places in Brazil:
Name
°F
+73°F
+81°F
+86°F
+84°F
+79°F
+57°F
+63°F
+66°F
+66°F
+82°F
+59°F
24 Hours Forecast
Porto Alegre
Local time: 12:43
September 15, tuesday
1500
63°F
N
8 mph
1800
61°F
N
3 mph
2100
59°F
N
1 mph
September 16, wednesday
0000
55°F
SW
1 mph
0300
52°F
SE
4 mph
0600
50°F
N
5 mph
0900
57°F
N
4 mph
1200
57°F
NW
6 mph
Units of measurement: °C / °F