What is the weather like in Helsinki vs Oslo in September?

In September, Helsinki averages 16°C high / 10°C low with about 65 mm of rain; Oslo averages 18°C high / 10°C low with about 93 mm.

Helsinki vs Oslo in September

Helsinki and Oslo are nearly tied in September — 77 vs 74 on SeasonMap's comfort score. Helsinki is cool, a little rain, clean air; Oslo is nice, rainy, clean air.

Helsinki vs Oslo — September climate, side by side

	🇫🇮 Helsinki	🇳🇴 Oslo
Comfort score	77/100 (B)	74/100 (B)
Feels-like high	15°C	16°C
Avg high / low	16° / 10°	18° / 10°
Rainfall	65 mm	93 mm
Rainy days	9	10
Humidity	82%	82%
Air quality (AQI)	37	38

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Helsinki 🇫🇮 Finlandcool, a little rain, clean air · best July77
Oslo 🇳🇴 Norwaynice, rainy, clean air · best July74

Helsinki vs Oslo in September — FAQ

Is September better in Helsinki or Oslo?: Helsinki and Oslo are nearly tied in September — 77 vs 74 on SeasonMap's comfort score. Helsinki is cool, a little rain, clean air; Oslo is nice, rainy, clean air.
What is the weather like in Helsinki vs Oslo in September?: In September, Helsinki averages 16°C high / 10°C low with about 65 mm of rain; Oslo averages 18°C high / 10°C low with about 93 mm.