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

In September, Copenhagen averages 19°C high / 13°C low with about 66 mm of rain; Mariehamn averages 16°C high / 9°C low with about 54 mm.

Copenhagen vs Mariehamn in September

Copenhagen is the better pick in September — 82 vs 73 on SeasonMap's comfort score. Copenhagen is nice, a little rain, clean air, while Mariehamn is cool, a little rain, clean air.

Copenhagen vs Mariehamn — September climate, side by side

	🇩🇰 Copenhagen	Mariehamn
Comfort score	82/100 (A)	73/100 (B)
Feels-like high	17°C	14°C
Avg high / low	19° / 13°	16° / 9°
Rainfall	66 mm	54 mm
Rainy days	10	8
Humidity	79%	79%
Air quality (AQI)	42	38

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

Month by month

Copenhagen vs Mariehamn in September — FAQ

Is September better in Copenhagen or Mariehamn?: Copenhagen is the better pick in September — 82 vs 73 on SeasonMap's comfort score. Copenhagen is nice, a little rain, clean air, while Mariehamn is cool, a little rain, clean air.
What is the weather like in Copenhagen vs Mariehamn in September?: In September, Copenhagen averages 19°C high / 13°C low with about 66 mm of rain; Mariehamn averages 16°C high / 9°C low with about 54 mm.