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

In September, Copenhagen averages 19°C high / 13°C low with about 66 mm of rain; Helsinki averages 16°C high / 10°C low with about 65 mm.

Copenhagen vs Helsinki in September

Copenhagen is the better pick in September — 82 vs 77 on SeasonMap's comfort score. Copenhagen is nice, a little rain, clean air, while Helsinki is cool, a little rain, clean air.

Copenhagen vs Helsinki — September climate, side by side

	🇩🇰 Copenhagen	🇫🇮 Helsinki
Comfort score	82/100 (A)	77/100 (B)
Feels-like high	17°C	15°C
Avg high / low	19° / 13°	16° / 10°
Rainfall	66 mm	65 mm
Rainy days	10	9
Humidity	79%	82%
Air quality (AQI)	42	37

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

Month by month

Copenhagen vs Helsinki in September — FAQ

Is September better in Copenhagen or Helsinki?: Copenhagen is the better pick in September — 82 vs 77 on SeasonMap's comfort score. Copenhagen is nice, a little rain, clean air, while Helsinki is cool, a little rain, clean air.
What is the weather like in Copenhagen vs Helsinki in September?: In September, Copenhagen averages 19°C high / 13°C low with about 66 mm of rain; Helsinki averages 16°C high / 10°C low with about 65 mm.