Porto Alegre in september: average Weather, Temperature and Climate
Weather in Porto Alegre in september 2025
The weather in Porto Alegre in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
59°F
Clear/Sunny
29% of time
18%
18%
17%
Weather at 12pm
72°F
Clear/Sunny
40% of time
22%
18%
12%
Weather at 6pm
67°F
Clear/Sunny
44% of time
19%
19%
10%
Weather at 3am
59°F
34%
18%
17%
16%
Evolution of daily average temperature and precipitation in Porto Alegre in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Porto Alegre in september.
The climate of Porto Alegre in september is good
The climate in september in Porto Alegre is wet (with 7.1in of precipitation over 8 days). It should be noted a worsening from the previous month since in august there is an average of 6.9in of rainfall over 7 days.
The climate nice in this city the month of september. The high seasonal norm is 74°F. The seasonal minimum is 59°F. Thus, the mean temperature average on this month of september in Porto Alegre is 67°F. Note that seasonal normals in contrast with those observed in Porto Alegre in the month of september with a maximum record of 101°F in 2017 and a minimum record of 40°F in 2011. You can plan to have about 27 days with temperatures over 65°F, or 90% of time.
On this month of september, day length in Porto Alegre is generally 11:54. The sun rises at 06:23 and sets at 18:17.
With a good weather, the month of september is recommended to go in that area in Brazil.
Seasonal average climate and temperature of Porto Alegre in september
Check below seasonal norms These datas are generated from the weather statements earlier years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 67°F | ||||
| Highest temperature | 74°F | ||||
| Lowest temperature | 59°F | ||||
| Highest record temperature | 101°F (2017) | ||||
| Lowest record temperature | 40°F (2011) | ||||
| Number of days at +86°F | 3 day(s) (10%) | ||||
| Number of days at +65°F | 27 day(s) (90%) | ||||
| Sea temperature | |||||
| Average sea temperature | 62°F | ||||
| Lowest sea temperature | 59°F | ||||
| Highest sea temperature | 65°F | ||||
| Wind | |||||
| Wind speed | 16km/h | ||||
| Wind temperature | 58°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 7.1in | ||||
| Number of days with rainfall | 8 day(s) (27%) | ||||
| Record daily rainfall | 4.7in (2017) | ||||
| Other climate data | |||||
| Humidity | 90% | ||||
| Visibility | 8.75km | ||||
| Cloud cover | 42% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:23 | ||||
| Time of sunset | 18:17 | ||||
| Length of day | 11:54 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Porto Alegre in september 2024:
59°F to 68°F
54°F to 70°F
54°F to 76°F
59°F to 72°F
54°F to 65°F
50°F to 72°F
58°F to 79°F
61°F to 74°F
67°F to 85°F
70°F to 97°F
72°F to 99°F
63°F to 70°F
65°F to 70°F
65°F to 67°F
54°F to 68°F
58°F to 68°F
56°F to 77°F
59°F to 79°F
61°F to 86°F
67°F to 74°F
63°F to 81°F
63°F to 92°F
74°F to 94°F
68°F to 76°F
68°F to 74°F
63°F to 68°F
61°F to 70°F
56°F to 76°F
59°F to 85°F
67°F to 88°F
Map: other cities in Brazil in september
Cities near Porto Alegre:
| Vale dos Vinhedos in september | good weather |
| Tavares (Rio Grande do Sul) in september | good weather |
| Pelotas in september | good weather |
| Passo Fundo in september | good weather |
| Criciúma in september | good weather |
| Urubici in september | good weather |
| Bagé in september | good weather |
| Praia do Rosa (Santa Catarina) in september | good weather |
| Florianopolis (Santa Catarina Island) in september | good weather |
| Joinville in september | good weather |
| Curitiba in september | good weather |
| Uruguaiana in september | good weather |
Click over cities on the map for information about the weather in september.
Porto Alegre
perfect weather
good
tolerable
bad
very bad
Weather data for Porto Alegre in september:
Weather data for Porto Alegre for september are derived from an average of the weather forecast since 2009 in Porto Alegre. There is a margin of error and these forecasts are to be considered as general information only. The weather in Porto Alegre can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Porto Alegre.