Kotka in september: average Weather, Temperature and Climate
Weather in Kotka in september 2025
The weather in Kotka in september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather
Weather at 6am
56°F
Clear/Sunny
26% of time
26%
23%
17%
Weather at 12pm
59°F
Clear/Sunny
30% of time
25%
24%
14%
Weather at 6pm
58°F
Moderate rain at times
28% of time
28%
21%
15%
Weather at 3am
54°F
31%
25%
21%
19%
Evolution of daily average temperature and precipitation in Kotka in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Kotka in september.
The climate of Kotka in september is tolerable
The weather in september in Kotka is wet (with 4.5in of rainfall over 7 days). This is better than the previous month since in august it receives an average of 5.9in of rainfall over 9 days.
The climate is rather cold in that locality the month of september, but it is bearable by dressing hot. The high seasonal norm is 59°F. On average, the recorded minimum temperature is 56°F. Thus, the mean temperature average in september in Kotka is 58°F. These temperatures are far removed from those records observed in Kotka in september with a maximum record of 70°F in 2018 and a minimum record of 38°F in 2013. You can plan to have about 4 days with temperatures up to 65°F, or 13% of time.
On this month of september, day length in Kotka is generally 12:53. Sunrise is at 05:40 and sets at 18:33.
With a correct climate, the month of september is okay (but not the best) to go in that area in Finland.
Kotka: another month?
If you can push the dates of your trip to Kotka forward, the month of october has a better weather forecast than september. more information
September: another location in Finland?
If you want to go to Finland in september, there are destinations with better weather than Kotka:
In september, Helsinki, Turku, Masku, Pori, Turku Archipelago (Abo Skargard) and Ekenäs have good weather.
Seasonal average climate and temperature of Kotka in september
Check below seasonal norms These datas are compiled from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 58°F | ||||
| Highest temperature | 59°F | ||||
| Lowest temperature | 56°F | ||||
| Highest record temperature | 70°F (2018) | ||||
| Lowest record temperature | 38°F (2013) | ||||
| Number of days at +65°F | 4 day(s) (13%) | ||||
| Number of days at -32°F | 0 day(s) (0%) | ||||
| Sea temperature | |||||
| Average sea temperature | 59°F | ||||
| Lowest sea temperature | 53°F | ||||
| Highest sea temperature | 66°F | ||||
| Wind | |||||
| Wind speed | 23km/h | ||||
| Wind temperature | 52°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.5in | ||||
| Number of days with rainfall | 7 day(s) (23%) | ||||
| Record daily rainfall | 1.7in (2012) | ||||
| Snowfall | 0cm | ||||
| Other climate data | |||||
| Humidity | 83% | ||||
| Visibility | 9.36km | ||||
| Cloud cover | 48% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:40 | ||||
| Time of sunset | 18:33 | ||||
| Length of day | 12:53 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Kotka in september 2024:
61°F to 65°F
63°F to 65°F
67°F to 68°F
67°F to 68°F
65°F to 68°F
63°F to 67°F
63°F to 67°F
63°F to 67°F
61°F to 67°F
63°F to 67°F
59°F to 65°F
61°F to 63°F
61°F to 63°F
61°F to 65°F
59°F to 61°F
59°F to 63°F
59°F to 61°F
58°F to 59°F
58°F to 59°F
58°F to 59°F
56°F to 59°F
49°F to 52°F
52°F to 58°F
56°F to 61°F
58°F to 59°F
58°F to 58°F
58°F to 59°F
56°F to 58°F
49°F to 54°F
50°F to 52°F
Map: other cities in Finland in september
Cities near Kotka:
| Hamina in september | tolerable weather |
| Kouvola in september | tolerable weather |
| Porvoo in september | good weather |
| Lahti in september | tolerable weather |
| Mäntsälä in september | good weather |
| Lappeenranta in september | tolerable weather |
| Heinola in september | tolerable weather |
| Vantaa in september | good weather |
| Joutseno in september | tolerable weather |
| Saimaa in september | tolerable weather |
| Helsinki in september | good weather |
| Riihimäki in september | good weather |
Click over cities on the map for information about the weather in september.
Kotka
perfect weather
good
tolerable
bad
very bad
Weather data for Kotka in september:
Weather data for Kotka for september are derived from an average of the weather forecast since 2009 in Kotka. There is a margin of error and these forecasts are to be considered as general information only. The weather in Kotka 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 Kotka.