Porvoo in september: average Weather, Temperature and Climate
Weather in Porvoo in september 2025
The weather in Porvoo in the month of september comes from statistical datas on the past years. You can view the weather statistics for all the 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 0.3cm
Weather at 6am
54°F
Partly Cloudy
29% of time
28%
23%
15%
Weather at 12pm
61°F
Clear/Sunny
30% of time
24%
21%
20%
Weather at 6pm
56°F
Clear/Sunny
30% of time
27%
24%
13%
Weather at 3am
52°F
28%
24%
18%
18%
Evolution of daily average temperature and precipitation in Porvoo in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Porvoo in september.
The climate of Porvoo in september is good
The weather in september in Porvoo is quite dry (with 3.4in of precipitation over 5 days). The weather is better from the previous month since in august it receives an average of 4in of rainfall over 7 days.
The climate is rather cold in this city this month, but it is bearable when dressing warm. The thermometer averaged maximum of 61°F. The minimum is 54°F. Thus, the mean temperature average on this month of september in Porvoo is 58°F. Note that these seasonal averages are in contrast with those observed in Porvoo in september with a maximum record of 74°F in 2018 and a minimum record of 36°F in 2013. You can expect to have about 8 days with temperatures up to 65°F, or 27% of the month.
Day length in Porvoo in september is 12:53. Sunrise is at 05:45 and sets at 18:38.
With proper weather, the month of september is okay (but not good) to go there.
Seasonal average climate and temperature of Porvoo in september
Check below seasonal norms These statistics are compiled from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 58°F | ||||
| Highest temperature | 61°F | ||||
| Lowest temperature | 54°F | ||||
| Highest record temperature | 74°F (2018) | ||||
| Lowest record temperature | 36°F (2013) | ||||
| Number of days at +65°F | 8 day(s) (27%) | ||||
| Number of days at -32°F | 0 day(s) (0%) | ||||
| Sea temperature | |||||
| Average sea temperature | 60°F | ||||
| Lowest sea temperature | 53°F | ||||
| Highest sea temperature | 66°F | ||||
| Wind | |||||
| Wind speed | 18km/h | ||||
| Wind temperature | 52°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.4in | ||||
| Number of days with rainfall | 5 day(s) (18%) | ||||
| Record daily rainfall | 1.5in (2012) | ||||
| Snowfall | 0.3cm | ||||
| Other climate data | |||||
| Humidity | 85% | ||||
| Visibility | 9.29km | ||||
| Cloud cover | 47% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:45 | ||||
| Time of sunset | 18:38 | ||||
| Length of day | 12:53 | ||||
| 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 Porvoo in september 2024:
56°F to 61°F
58°F to 65°F
59°F to 70°F
61°F to 70°F
59°F to 74°F
59°F to 68°F
58°F to 70°F
59°F to 70°F
58°F to 72°F
63°F to 68°F
59°F to 65°F
58°F to 65°F
59°F to 63°F
59°F to 68°F
54°F to 61°F
52°F to 67°F
58°F to 68°F
52°F to 65°F
52°F to 68°F
52°F to 68°F
52°F to 61°F
41°F to 52°F
49°F to 58°F
58°F to 65°F
59°F to 63°F
56°F to 59°F
58°F to 59°F
50°F to 56°F
41°F to 52°F
41°F to 54°F
Map: other cities in Finland in september
Cities near Porvoo:
| Mäntsälä in september | good weather |
| Vantaa in september | good weather |
| Helsinki in september | good weather |
| Riihimäki in september | good weather |
| Lahti in september | tolerable weather |
| Kotka in september | tolerable weather |
| Kirkkonummi in september | good weather |
| Kouvola in september | tolerable weather |
| Hamina in september | tolerable weather |
| Lohja in september | good weather |
| Heinola in september | tolerable weather |
| Hämeenlinna in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Porvoo
perfect weather
good
tolerable
bad
very bad
Weather data for Porvoo in september:
Weather data for Porvoo for september are derived from an average of the weather forecast since 2009 in Porvoo. There is a margin of error and these forecasts are to be considered as general information only. The weather in Porvoo 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 Porvoo.