Porto in september: average Weather, Temperature and Climate
Weather in Porto in september 2025
The weather in Porto in september comes from statistical datas on the last 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
perfect weather UV index: 6
Weather at 6am
65°F
Clear/Sunny
57% of time
17%
10%
9%
Weather at 12pm
77°F
Clear/Sunny
68% of time
15%
10%
5%
Weather at 6pm
72°F
Clear/Sunny
65% of time
17%
12%
5%
Weather at 3am
65°F
57%
15%
12%
11%
Evolution of daily average temperature and precipitation in Porto in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Porto in september.
The climate of Porto in september is perfect
The climate in september in Porto is rather dry (with 2.9in of rainfall over 3 days). The weather's not getting better compared to the previous month since in august there is an average of 0.9in of rainfall over 2 days.
The climate quite nice there september. The high seasonal norm is 77°F. The minimum is 65°F. Thus, the mean temperature average on this month of september in Porto is 72°F. Note that seasonal normals are in contrast with those observed in Porto in september with a maximum record of 99°F in 2018 and a minimum record of 52°F in 2010. You can expect to have about 4 days with temperatures up to 86°F, or 13 of the month.
On this month of september, day length in Porto is generally 12:28. Sunrise is at 06:15 and sunset is at 18:43.
With a perfect climate, the month of september is recommended to go in Porto in Portugal.
Seasonal average climate and temperature of Porto in september
Check below seasonal norms These datas are generated from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 72°F | ||||
| Highest temperature | 77°F | ||||
| Lowest temperature | 65°F | ||||
| Highest record temperature | 99°F (2018) | ||||
| Lowest record temperature | 52°F (2010) | ||||
| Number of days at +86°F | 4 day(s) (13%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 65°F | ||||
| Lowest sea temperature | 62°F | ||||
| Highest sea temperature | 68°F | ||||
| Wind | |||||
| Wind speed | 16km/h | ||||
| Wind temperature | 65°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 2.9in | ||||
| Number of days with rainfall | 3 day(s) (10%) | ||||
| Record daily rainfall | 2.9in (2015) | ||||
| Other climate data | |||||
| Humidity | 79% | ||||
| Visibility | 9.36km | ||||
| Cloud cover | 22% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:15 | ||||
| Time of sunset | 18:43 | ||||
| Length of day | 12:28 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | perfect | ||||
How was the weather last september?
Here is the day by day recorded weather in Porto in september 2024:
65°F to 70°F
63°F to 70°F
58°F to 72°F
59°F to 76°F
61°F to 70°F
56°F to 65°F
59°F to 68°F
58°F to 68°F
59°F to 70°F
61°F to 72°F
61°F to 74°F
61°F to 72°F
61°F to 77°F
63°F to 79°F
63°F to 81°F
67°F to 85°F
67°F to 83°F
63°F to 77°F
63°F to 72°F
63°F to 70°F
63°F to 70°F
61°F to 68°F
56°F to 67°F
59°F to 65°F
65°F to 67°F
65°F to 67°F
59°F to 65°F
54°F to 70°F
59°F to 70°F
61°F to 72°F
Map: other cities in Portugal in september
Cities near Porto:
| Vila Nova de Gaia in september | perfect weather |
| Canidelo in september | perfect weather |
| Leca da Palmeira in september | perfect weather |
| Arcozelo in september | perfect weather |
| Lavra in september | perfect weather |
| Espinho in september | perfect weather |
| Esmoriz in september | perfect weather |
| Vila do Conde in september | perfect weather |
| Paredes in september | perfect weather |
| Póvoa de Varzim in september | perfect weather |
| Pedroso in september | perfect weather |
| Sao Joao da Madeira in september | perfect weather |
Click over cities on the map for information about the weather in september.
Porto
perfect weather
good
tolerable
bad
very bad
Weather data for Porto in september:
Weather data for Porto for september are derived from an average of the weather forecast since 2009 in Porto. There is a margin of error and these forecasts are to be considered as general information only. The weather in Porto 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.