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Monthly climate in Altena, North Rhine-Westphalia, Germany

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Altena features a oceanic climate (Cfb).Temperatures typically range between 2 °C (35 °F) and 18 °C (64 °F) through the year, but rarely can drop to -17 °C (1 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1096 mm (43.1 inches) and receives 175 rainy days on the 1 mm (0.04 inches) threshold annually.Altena enjoys an average of 3203 hours of sunshine throughout the year, and daylight varies from 7 hours 56 minutes to 16 hours 29 minutes per day.

Monthly average temperatures in Altena, North Rhine-Westphalia, Germany §

The warmest months in Altena are June, July and August, with daily mean temperatures ranging from 17 to 18 °C (63 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 3 °C (35 - 38 °F) throughout the day. On average each year, Altena experiences 20 days above 25 °C (77.0 °F) and 52 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Altena, North Rhine-Westphalia, Germany.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 13°C
(55°F)		 18°C
(65°F)		 21°C
(70°F)		 26°C
(79°F)		 31°C
(87°F)		 33°C
(91°F)		 36°C
(97°F)		 34°C
(93°F)		 30°C
(86°F)		 24°C
(76°F)		 18°C
(65°F)		 13°C
(56°F)
Mean maximum 10°C
(50°F)		 14°C
(57°F)		 17°C
(63°F)		 23°C
(73°F)		 26°C
(79°F)		 27°C
(82°F)		 29°C
(85°F)		 30°C
(85°F)		 27°C
(81°F)		 21°C
(69°F)		 15°C
(60°F)		 12°C
(53°F)
Average high 3°C
(38°F)		 6°C
(43°F)		 9°C
(49°F)		 13°C
(56°F)		 17°C
(62°F)		 22°C
(71°F)		 22°C
(72°F)		 22°C
(72°F)		 18°C
(65°F)		 14°C
(57°F)		 8°C
(46°F)		 5°C
(41°F)
Daily mean 2°C
(35°F)		 3°C
(37°F)		 5°C
(42°F)		 9°C
(48°F)		 12°C
(54°F)		 17°C
(63°F)		 18°C
(64°F)		 18°C
(64°F)		 14°C
(57°F)		 10°C
(51°F)		 6°C
(42°F)		 3°C
(38°F)
Average low -0°C
(32°F)		 0°C
(33°F)		 2°C
(35°F)		 4°C
(40°F)		 8°C
(46°F)		 13°C
(55°F)		 13°C
(56°F)		 14°C
(57°F)		 10°C
(50°F)		 8°C
(46°F)		 3°C
(39°F)		 2°C
(35°F)
Mean minimum -6°C
(21°F)		 -7°C
(20°F)		 -5°C
(23°F)		 -3°C
(27°F)		 1°C
(34°F)		 7°C
(44°F)		 8°C
(47°F)		 8°C
(46°F)		 4°C
(40°F)		 1°C
(35°F)		 -2°C
(28°F)		 -4°C
(25°F)
Minimum -13°C
(8°F)		 -17°C
(1°F)		 -12°C
(11°F)		 -5°C
(23°F)		 -1°C
(30°F)		 6°C
(42°F)		 7°C
(44°F)		 7°C
(44°F)		 0°C
(33°F)		 -1°C
(31°F)		 -5°C
(23°F)		 -6°C
(22°F)

Compare climate in Altena with other places

Compare temperature, precipitation, sunshine, UV index in Altena, North Rhine-Westphalia, Germany with other places around the world.

Monthly average precipitation in Altena, North Rhine-Westphalia, Germany §

Altena usually has the most precipitation in July, October and December, with an average of 16 rainy days and 112 mm (4.4 inches) of precipitation per month.The driest months in Altena are April, September and November. On average, 64 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Altena, North Rhine-Westphalia, Germany.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 100 (3.9) 96 (3.8) 103 (4.1) 49 (1.9) 93 (3.7) 81 (3.2) 107 (4.2) 96 (3.8) 75 (3.0) 104 (4.1) 66 (2.6) 124 (4.9)
Average precipitation days (≥ 1 mm) 15 14 16 11 15 13 13 16 13 16 13 20

Monthly sunshine hours in Altena, North Rhine-Westphalia, Germany §

The sunniest months in Altena are May, June and July, when the sun shines an average of 12 hours 36 minutes a day.Least sunny months in Altena: January, November and December receive an average of 3 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Altena, North Rhine-Westphalia, Germany.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 97 191 251 337 379 379 401 373 307 217 163 104
Mean daily daylight hours 8h 26m 9h 59m 11h 54m 13h 53m 15h 35m 16h 29m 16h 1m 14h 28m 12h 34m 10h 37m 8h 52m 7h 56m

Solar UV radiation in Altena, North Rhine-Westphalia, Germany §

Altena 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 Altena UV Index data.

Average daily maximum UV levels by month for Altena, North Rhine-Westphalia, Germany.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 1 2 4 5 7 8 8 7 5 4 2 1