What is the weather like in Cologne vs Heidelberg in September?

In September, Cologne averages 22°C high / 11°C low with about 65 mm of rain; Heidelberg averages 23°C high / 12°C low with about 75 mm.

Cologne vs Heidelberg in September

Heidelberg is the better pick in September — 91 vs 85 on SeasonMap's comfort score. Heidelberg is nice, a little rain, clean air, while Cologne is nice, a little rain, clean air.

Cologne vs Heidelberg — September climate, side by side

	🇩🇪 Cologne	🇩🇪 Heidelberg
Comfort score	85/100 (A)	91/100 (S)
Feels-like high	21°C	22°C
Avg high / low	22° / 11°	23° / 12°
Rainfall	65 mm	75 mm
Rainy days	9	10
Humidity	74%	71%
Air quality (AQI)	48	44

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

Month by month

Cologne vs Heidelberg in September — FAQ

Is September better in Cologne or Heidelberg?: Heidelberg is the better pick in September — 91 vs 85 on SeasonMap's comfort score. Heidelberg is nice, a little rain, clean air, while Cologne is nice, a little rain, clean air.
What is the weather like in Cologne vs Heidelberg in September?: In September, Cologne averages 22°C high / 11°C low with about 65 mm of rain; Heidelberg averages 23°C high / 12°C low with about 75 mm.