Weather in Kotka in september
Climate normals based on 10 years of historical data for Kotka, Finland.
Average high
15°C
Average low
11°C
Rainfall
69 mm
11 rainy days
Sunshine
2.9h/day
Luftfuktighet
78%
How Hot Is Kotka in september?
Expect daytime highs around 15°C and overnight lows near 11°C in Kotka during September — an average of 13°C across the day. It's roughly 5°C cooler than August and on par with October.
Sunshine Hours in september
Cloud cover keeps Kotka dim: 2.9h of sun, daylight from 6:40 am to 7:30 pm.
Does It Rain In Kotka In september?
Steady, frequent rain defines September: Kotka averages 69mm in 11 days.
Is Kotka Humid In september?
Air feels constantly thick in Kotka: 78% humidity is the norm in September.
Wind In Kotka In september
Wind picks up in Kotka during September — averaging 24 kph, with gustier afternoons.
Cloud Cover In Kotka In september
Kotka's September runs cloudy: typical cloud cover of 68%.
Cities With Similar Weather In september
Weather in Kotka, month by month
| Month | High / Low | Regn | |
|---|---|---|---|
| Vädret i januari | -2°C / -6°C | 66mm | Details → |
| Vädret i februari | -2°C / -6°C | 63mm | Details → |
| Vädret i mars | 1°C / -4°C | 51mm | Details → |
| Vädret i april | 6°C / 1°C | 44mm | Details → |
| Vädret i maj | 13°C / 6°C | 42mm | Details → |
| Vädret i juni | 18°C / 12°C | 53mm | Details → |
| Vädret i juli | 20°C / 15°C | 76mm | Details → |
| Vädret i augusti | 19°C / 15°C | 76mm | Details → |
| Vädret i september | 15°C / 11°C | 69mm | |
| Vädret i oktober | 9°C / 5°C | 79mm | Details → |
| Vädret i november | 5°C / 2°C | 73mm | Details → |
| Vädret i december | 1°C / -2°C | 72mm | Details → |