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Monthly climate in Undur Sume, Mongolia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Undur Sume features a subarctic climate (Dwc). Temperatures typically range between -23 °C (-9 °F) and 15 °C (59 °F) through the year, but rarely can drop to -41 °C (-42 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 542 mm (21.4 inches) and receives 82 rainy days on the 1 mm (0.04 inches) threshold annually. Undur Sume enjoys an average of 3768 hours of sunshine throughout the year, and daylight varies from 8 hours 4 minutes to 16 hours 21 minutes per day.

Monthly average temperatures in Undur Sume, Mongolia

The warmest months in Undur Sume are June, July and August, with daily mean temperatures ranging from 13 to 15 °C (55 - 59 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -23 to -19 °C (-9 - -2 °F) throughout the day. On average each year, Undur Sume experiences 3 days above 25 °C (77.0 °F) and 218 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Undur Sume. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum-6°C
(22°F)		4°C
(40°F)		12°C
(54°F)		24°C
(75°F)		28°C
(83°F)		28°C
(83°F)		28°C
(82°F)		24°C
(76°F)		24°C
(76°F)		18°C
(64°F)		6°C
(43°F)		2°C
(35°F)
Mean maximum-9°C
(16°F)		-2°C
(30°F)		8°C
(47°F)		19°C
(66°F)		25°C
(76°F)		25°C
(78°F)		26°C
(78°F)		23°C
(73°F)		21°C
(70°F)		13°C
(55°F)		4°C
(40°F)		-4°C
(25°F)
Average high-16°C
(3°F)		-11°C
(12°F)		-1°C
(30°F)		8°C
(46°F)		14°C
(57°F)		19°C
(66°F)		20°C
(68°F)		18°C
(65°F)		14°C
(57°F)		4°C
(40°F)		-6°C
(21°F)		-14°C
(7°F)
Daily mean-23°C
(-9°F)		-19°C
(-2°F)		-9°C
(16°F)		1°C
(34°F)		7°C
(45°F)		13°C
(55°F)		15°C
(59°F)		13°C
(56°F)		7°C
(45°F)		-2°C
(28°F)		-12°C
(11°F)		-20°C
(-4°F)
Average low-28°C
(-19°F)		-26°C
(-14°F)		-16°C
(3°F)		-5°C
(23°F)		-0°C
(32°F)		6°C
(43°F)		10°C
(50°F)		8°C
(47°F)		2°C
(35°F)		-7°C
(19°F)		-16°C
(3°F)		-24°C
(-11°F)
Mean minimum-36°C
(-33°F)		-33°C
(-28°F)		-26°C
(-15°F)		-13°C
(8°F)		-8°C
(18°F)		-0°C
(32°F)		5°C
(42°F)		2°C
(37°F)		-6°C
(21°F)		-16°C
(4°F)		-26°C
(-14°F)		-35°C
(-30°F)
Minimum-41°C
(-42°F)		-39°C
(-38°F)		-31°C
(-24°F)		-17°C
(2°F)		-12°C
(10°F)		-3°C
(28°F)		5°C
(40°F)		-0°C
(32°F)		-10°C
(14°F)		-19°C
(-2°F)		-29°C
(-21°F)		-39°C
(-37°F)

Compare climate in Undur Sume with other places

Compare temperature, precipitation, sunshine, UV index in Undur Sume, Mongolia with other places around the world.

Monthly average precipitation in Undur Sume, Mongolia

Undur Sume usually has the most precipitation in June, July and August, with an average of 15 rainy days and 123 mm (4.8 inches) of precipitation per month. The driest months in Undur Sume are January, February and December. On average, 2 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Undur Sume. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)2 (0.1)3 (0.1)13 (0.5)28 (1.1)39 (1.5)89 (3.5)132 (5.2)147 (5.8)47 (1.9)29 (1.1)11 (0.4)1 (0.1)
Average precipitation days (≥ 1 mm)002781218179630

Monthly sunshine hours in Undur Sume, Mongolia

The sunniest months in Undur Sume are May, June and July, when the sun shines an average of 12 hours 33 minutes a day. Least sunny months in Undur Sume: January, November and December receive an average of 7 hours 28 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Undur Sume. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours196268337348391387376353315301248243
Mean daily daylight hours8h 32m10h 2m11h 54m13h 49m15h 28m16h 21m15h 54m14h 25m12h 34m10h 41m8h 58m8h 4m

Solar UV radiation in Undur Sume, Mongolia

Undur Sume 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 Undur Sume UV Index data.

Average daily maximum UV levels by month for Undur Sume. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235689986521