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Monthly climate in Altheim, Germany

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Altheim features a oceanic climate (Cfb). Temperatures typically range between 0 °C (32 °F) and 18 °C (65 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 1051 mm (41.4 inches) and receives 162 rainy days on the 1 mm (0.04 inches) threshold annually. Altheim enjoys an average of 3506 hours of sunshine throughout the year, and daylight varies from 8 hours 24 minutes to 15 hours 59 minutes per day.

Monthly average temperatures in Altheim, Germany

The warmest months in Altheim are June, July and August, with daily mean temperatures ranging from 17 to 18 °C (63 - 65 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 2 °C (32 - 36 °F) throughout the day. On average each year, Altheim experiences 29 days above 25 °C (77.0 °F) and 84 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Altheim. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(56°F)		17°C
(64°F)		20°C
(69°F)		25°C
(78°F)		29°C
(85°F)		33°C
(91°F)		33°C
(92°F)		32°C
(90°F)		28°C
(83°F)		23°C
(73°F)		18°C
(65°F)		13°C
(56°F)
Mean maximum9°C
(49°F)		14°C
(58°F)		18°C
(64°F)		23°C
(74°F)		26°C
(79°F)		28°C
(82°F)		30°C
(86°F)		30°C
(87°F)		26°C
(79°F)		21°C
(70°F)		16°C
(61°F)		12°C
(53°F)
Average high3°C
(37°F)		6°C
(43°F)		9°C
(49°F)		14°C
(57°F)		17°C
(63°F)		22°C
(72°F)		23°C
(74°F)		23°C
(74°F)		19°C
(66°F)		14°C
(58°F)		7°C
(45°F)		4°C
(39°F)
Daily mean0°C
(32°F)		2°C
(36°F)		5°C
(40°F)		9°C
(48°F)		12°C
(54°F)		17°C
(63°F)		18°C
(65°F)		18°C
(65°F)		14°C
(57°F)		10°C
(49°F)		4°C
(39°F)		2°C
(35°F)
Average low-2°C
(28°F)		-1°C
(31°F)		0°C
(33°F)		3°C
(38°F)		7°C
(45°F)		12°C
(54°F)		13°C
(56°F)		13°C
(56°F)		9°C
(49°F)		6°C
(43°F)		1°C
(35°F)		-1°C
(31°F)
Mean minimum-8°C
(18°F)		-9°C
(16°F)		-7°C
(20°F)		-4°C
(25°F)		1°C
(35°F)		5°C
(42°F)		8°C
(46°F)		7°C
(46°F)		3°C
(37°F)		0°C
(33°F)		-3°C
(26°F)		-7°C
(20°F)
Minimum-16°C
(4°F)		-17°C
(2°F)		-17°C
(2°F)		-6°C
(22°F)		-1°C
(31°F)		5°C
(40°F)		6°C
(43°F)		6°C
(43°F)		1°C
(34°F)		-1°C
(31°F)		-5°C
(24°F)		-9°C
(17°F)

Compare climate in Altheim with other places

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

Monthly average precipitation in Altheim, Germany

Altheim usually has the most precipitation in May, June and August, with an average of 16 rainy days and 129 mm (5.1 inches) of precipitation per month. The driest months in Altheim are February, April and November. On average, 57 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Altheim. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)71 (2.8)67 (2.6)69 (2.7)52 (2.1)123 (4.9)139 (5.5)100 (3.9)123 (4.9)81 (3.2)78 (3.1)53 (2.1)94 (3.7)
Average precipitation days (≥ 1 mm)121114101715141612131117

Monthly sunshine hours in Altheim, Germany

The sunniest months in Altheim are June, July and August, when the sun shines an average of 12 hours 53 minutes a day. Least sunny months in Altheim: January, November and December receive an average of 5 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Altheim. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours139216287349375390415379319267207157
Mean daily daylight hours8h 50m10h 12m11h 55m13h 41m15h 12m15h 59m15h 34m14h 13m12h 31m10h 46m9h 13m8h 24m

Solar UV radiation in Altheim, Germany

Altheim experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, November 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 Altheim UV Index data.

Average daily maximum UV levels by month for Altheim. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235689986421