Finland weather in September
Finland in September averages 10°C (49°F), 57 mm of rain and 4.3 hours of sun a day.
Of the twelve months in Finland, September is the fourth warmest, the fifth wettest and the sixth dullest.
- Average temp
- 10°C (49°F)
5–14°C · 41–57°F
- Rainfall
- 57 mm
Showers likely
- Sunshine
- 4.3 h
hours per day
What is Finland like in September?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Finland in September?
A light rain jacket
About 57 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 5°C (41°F).
September compared with August and October
September in Finland is 5.1°C cooler than August and 10 mm drier than it, which averages 15°C (58°F).
September in Finland is 6°C warmer than October and about as wet as it, which averages 4°C (38°F).
Daylight in Finland in September
On 15 September the sun is up for 12 hours 55 minutes in Finland, rising about 06:43 and setting about 19:38 local time.
September ends 2 hours 49 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 6 hours 44 minutes short of June, the longest-lit month here.
Travel guides for Finland
What to read before you book.
Finland weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | -8°C / 18°F | 42 mm |
| February | -8°C / 18°F | 33 mm |
| March | -4°C / 26°F | 31 mm |
| April | 3°C / 37°F | 33 mm |
| May | 9°C / 48°F | 43 mm |
| June | 14°C / 57°F | 67 mm |
| July | 17°C / 62°F | 78 mm |
| August | 15°C / 58°F | 67 mm |
| September | 10°C / 49°F | 57 mm |
| October | 4°C / 38°F | 66 mm |
| November | -1°C / 30°F | 52 mm |
| December | -5°C / 23°F | 49 mm |
Check another month
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FAQs about Finland in September
September climate averages for Finland, 1991–2020.
Finland averages 10°C (49°F) in September, ranging from about 5°C (41°F) at night to 14°C (57°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 57 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 10°C (49°F) against 4°C (38°F) in October — 6°C warmer.
September is 5.1°C cooler than August, and about as wet.
Yes. September falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
About 4.3 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 55 minutes of daylight in mid-September, against 19 hours 39 minutes in June and 5 hours 15 minutes in December.
On 15 September, sunrise is about 06:43 and sunset about 19:38 local time. Both shift across the month — the month ends 2 hours 49 minutes shorter than it starts.
