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Monthly climate in Koeln, Germany

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Koeln features a oceanic climate (Cfb). Temperatures typically range between 3 °C (38 °F) and 20 °C (68 °F) through the year, but rarely can drop to -9 °C (16 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 964 mm (37.9 inches) and receives 159 rainy days on the 1 mm (0.04 inches) threshold annually. Koeln enjoys an average of 3327 hours of sunshine throughout the year, and daylight varies from 7 hours 58 minutes to 16 hours 27 minutes per day.

Monthly average temperatures in Koeln, Germany

The warmest months in Koeln are June, July and August, with daily mean temperatures ranging from 19 to 20 °C (67 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 5 °C (38 - 41 °F) throughout the day. On average each year, Koeln experiences 37 days above 25 °C (77.0 °F) and 29 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Koeln. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(59°F)		20°C
(68°F)		22°C
(72°F)		27°C
(81°F)		33°C
(91°F)		35°C
(95°F)		40°C
(104°F)		37°C
(99°F)		34°C
(93°F)		27°C
(80°F)		20°C
(68°F)		15°C
(59°F)
Mean maximum12°C
(54°F)		15°C
(60°F)		19°C
(66°F)		24°C
(76°F)		28°C
(83°F)		30°C
(86°F)		32°C
(90°F)		32°C
(91°F)		29°C
(85°F)		23°C
(73°F)		17°C
(62°F)		14°C
(57°F)
Average high5°C
(42°F)		8°C
(46°F)		11°C
(52°F)		15°C
(59°F)		19°C
(66°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		20°C
(69°F)		15°C
(60°F)		10°C
(49°F)		7°C
(45°F)
Daily mean3°C
(38°F)		5°C
(41°F)		7°C
(45°F)		10°C
(51°F)		14°C
(57°F)		19°C
(67°F)		20°C
(68°F)		20°C
(68°F)		16°C
(60°F)		12°C
(54°F)		7°C
(45°F)		5°C
(41°F)
Average low1°C
(35°F)		2°C
(36°F)		3°C
(38°F)		5°C
(42°F)		9°C
(49°F)		14°C
(58°F)		15°C
(59°F)		15°C
(60°F)		11°C
(53°F)		9°C
(49°F)		5°C
(40°F)		3°C
(38°F)
Mean minimum-4°C
(25°F)		-4°C
(25°F)		-3°C
(26°F)		-2°C
(30°F)		2°C
(36°F)		9°C
(48°F)		10°C
(50°F)		9°C
(49°F)		6°C
(43°F)		3°C
(38°F)		-1°C
(30°F)		-3°C
(27°F)
Minimum-8°C
(17°F)		-9°C
(16°F)		-9°C
(16°F)		-3°C
(26°F)		0°C
(33°F)		8°C
(46°F)		8°C
(48°F)		7°C
(44°F)		3°C
(37°F)		1°C
(34°F)		-4°C
(26°F)		-5°C
(24°F)

Compare climate in Koeln with other places

Compare temperature, precipitation, sunshine, UV index in Koeln, Germany with other places around the world.

Monthly average precipitation in Koeln, Germany

Koeln usually has the most precipitation in July, October and December, with an average of 15 rainy days and 107 mm (4.2 inches) of precipitation per month. The driest months in Koeln are April, June and September. On average, 54 mm (2.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Koeln. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)91 (3.6)86 (3.4)91 (3.6)38 (1.5)66 (2.6)60 (2.4)97 (3.8)78 (3.1)65 (2.5)97 (3.8)67 (2.6)127 (5.0)
Average precipitation days (≥ 1 mm)15131591310121410151320

Monthly sunshine hours in Koeln, Germany

The sunniest months in Koeln are May, June and July, when the sun shines an average of 12 hours 46 minutes a day. Least sunny months in Koeln: January, November and December receive an average of 4 hours 37 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Koeln. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours112202266336387382404377312232182129
Mean daily daylight hours8h 27m10h 0m11h 55m13h 52m15h 34m16h 27m15h 59m14h 27m12h 34m10h 38m8h 53m7h 58m

Solar UV radiation in Koeln, Germany

Koeln experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 7 - 8, which corresponds to the High / Very High category of sun exposure. January, February and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Koeln UV Index data.

Average daily maximum UV levels by month for Koeln. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)124578875421