Köln, North Rhine-Westphalia Weather by Month and Climate Averages

How much rain does Köln get?

Köln gets 789 mm of precipitation in an average year, spread over about 174 days with measurable rain. That is more rainy days than 68% of Germany.

August is the wettest month, with 81 mm. April is the driest, with 48 mm. December has the most rainy days, about 18.

The longest dry spell in the last five years lasted 19 days, to May 15, 2022.

Köln weather by month

Köln weather in January

In January, Köln averages a high of 6°C and a low of 2°C. It gets 64 mm of precipitation over about 16 rainy days. The sun is out about 22% of daylight hours. The January record high is 16°C (1999) and the record low is -16°C (1985).

Köln weather in February

In February, Köln averages a high of 7°C and a low of 2°C. It gets 56 mm of precipitation over about 15 rainy days. The sun is out about 26% of daylight hours. The February record high is 21°C (2021) and the record low is -16°C (1986).

Köln weather in March

In March, Köln averages a high of 12°C and a low of 4°C. It gets 53 mm of precipitation over about 15 rainy days. The sun is out about 38% of daylight hours. The March record high is 27°C (2021) and the record low is -10°C (1971).

Köln weather in April

In April, Köln averages a high of 16°C and a low of 7°C. It gets 48 mm of precipitation over about 12 rainy days. The sun is out about 39% of daylight hours. The April record high is 29°C (2007) and the record low is -5°C (1986).

Köln weather in May

In May, Köln averages a high of 20°C and a low of 11°C. It gets 59 mm of precipitation over about 13 rainy days. The sun is out about 37% of daylight hours. The May record high is 34°C (2017) and the record low is 1°C (2019). May is one of the most comfortable months to visit.

Köln weather in June

In June, Köln averages a high of 23°C and a low of 13°C. It gets 76 mm of precipitation over about 13 rainy days. The sun is out about 41% of daylight hours. The June record high is 37°C (2002) and the record low is 4°C (1991). June is one of the most comfortable months to visit.

Köln weather in July

In July, Köln averages a high of 25°C and a low of 16°C. It gets 81 mm of precipitation over about 15 rainy days. The sun is out about 35% of daylight hours. The July record high is 41°C (2019) and the record low is 6°C (1984). July is one of the most comfortable months to visit.

Köln weather in August

In August, Köln averages a high of 24°C and a low of 15°C. It gets 81 mm of precipitation over about 14 rainy days. The sun is out about 40% of daylight hours. The August record high is 38°C (2018) and the record low is 7°C (1993).

Köln weather in September

In September, Köln averages a high of 21°C and a low of 12°C. It gets 67 mm of precipitation over about 13 rainy days. The sun is out about 40% of daylight hours. The September record high is 34°C (2020) and the record low is 3°C (1971). September is one of the most comfortable months to visit.

Köln weather in October

In October, Köln averages a high of 16°C and a low of 9°C. It gets 65 mm of precipitation over about 14 rainy days. The sun is out about 26% of daylight hours. The October record high is 27°C (2011) and the record low is -2°C (2003).

Köln weather in November

In November, Köln averages a high of 10°C and a low of 5°C. It gets 68 mm of precipitation over about 16 rainy days. The sun is out about 25% of daylight hours. The November record high is 21°C (2020) and the record low is -7°C (1988).

Köln weather in December

In December, Köln averages a high of 7°C and a low of 3°C. It gets 72 mm of precipitation over about 18 rainy days. The sun is out about 18% of daylight hours. The December record high is 18°C (2022) and the record low is -14°C (1978).

Sunshine, humidity and wind in Köln

June is the sunniest month in Köln, with sunshine about 41% of daylight hours. December is the cloudiest, at 18%. Over the year the sun shines about 32% of daylight hours. Köln is sunnier than 58% of Germany.

Humidity peaks in December at 87% and is lowest in June at 63%.

Köln has about 5 days a year above 32°C. Köln is hotter than 75% of Germany.

First and last freeze in Köln

The first fall freeze in Köln typically comes around November 18, and the last spring freeze around March 25. That leaves a frost-free growing season of about 238 days.

Köln weather records

The hottest temperature on record at the Köln station is 41°C, on July 25, 2019. The coldest is -16°C, on January 8, 1985.

The wettest day on record brought 153 mm of rain, on July 14, 2021.

56 all-time records have been set at the station since 1970.

The annual mean temperature has changed by +0.4°C per decade since 1970.

The best time to visit Köln

The most comfortable time to visit is typically May to July and September, when daytime highs sit near 22°C.

Winter (December–February) is chilly, with average highs around 7°C and lows near 2°C.

Spring (March–May) is mild, with average highs around 16°C and lows near 7°C.

Summer (June–August) is warm, with average highs around 24°C and lows near 15°C.

Autumn (September–November) is mild, with average highs around 15°C and lows near 9°C.

Köln climate questions

How much rain does Köln get?

Köln gets 789 mm of precipitation in an average year, over about 174 rainy days.

What is the wettest month in Köln?

August is the wettest month in Köln, with 81 mm. April is the driest, with 48 mm.

How many rainy days does Köln have a year?

Köln has about 174 days with measurable rain in an average year. December has the most, about 18.

What is the hottest month in Köln?

July is the warmest month in Köln, with an average high of 25°C.

What is the coldest month in Köln?

January is the coldest month in Köln, with an average low of 2°C.

What is the record high temperature in Köln?

The record high at the Köln station is 41°C, set on July 25, 2019. The record low is -16°C, on January 8, 1985.

What is the sunniest month in Köln?

June is the sunniest month in Köln, with sunshine about 41% of daylight hours. December is the cloudiest.

When is the first frost in Köln?

The first fall freeze in Köln typically comes around November 18. The last spring freeze is around March 25.

What is the best time to visit Köln?

The most comfortable time to visit is typically May to July and September, when daytime highs sit near 22°C.