Thermograph

How unusual is the weather? Graded against ~45 years of local climate history.

Weather in Köln in September

In an average September, Köln sees a daily high around 19°C and a low around 11°C, based on 1980–2026 of local climate records.

Average high19°C
Typical high range14°C to 26°C
Average low11°C
Typical low range8°C to 15°C
Average daily precipitation3 mm

September records

The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.

High

Highest 34°C 2020-09-15
Lowest 10°C 2025-09-25

Low

Highest 20°C 2016-09-14
Lowest 3°C 2018-09-29

Feels-like

Highest 38°C 2020-09-15
Lowest 0°C 1995-09-29

Humidity

Highest 16.3 g/m³ 2024-09-02
Lowest 6.0 g/m³ 2002-09-24

Wind

Highest 41 km/h 1998-09-14
Lowest 4 km/h 1989-09-06

Gust

Highest 84 km/h 1998-09-14
Lowest 12 km/h 2016-09-20

Precip

Wettest 183 mm 1998
Driest 21 mm 2016

See Köln's live weather grade →

Visiting Köln in September? See how its comfort stacks up against where you live.

Compare Köln with your city →

‹ August · Köln climate overview · October ›