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Monthly climate in Bayan Uula Sumu, Mongolia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Bayan Uula Sumu features a cold semi-arid climate (BSk). Temperatures typically range between -14 °C (7 °F) and 22 °C (73 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 108 mm (4.3 inches) and receives 20 rainy days on the 1 mm (0.04 inches) threshold annually. Bayan Uula Sumu enjoys an average of 3808 hours of sunshine throughout the year, and daylight varies from 8 hours 48 minutes to 15 hours 33 minutes per day.

Monthly average temperatures in Bayan Uula Sumu, Mongolia

The warmest months in Bayan Uula Sumu are June, July and August, with daily mean temperatures ranging from 20 to 22 °C (68 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -14 to -10 °C (7 - 14 °F) throughout the day. On average each year, Bayan Uula Sumu experiences 57 days above 25 °C (77.0 °F) and 167 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Bayan Uula Sumu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum1°C
(34°F)		13°C
(55°F)		18°C
(64°F)		28°C
(82°F)		32°C
(89°F)		35°C
(95°F)		37°C
(99°F)		32°C
(90°F)		30°C
(86°F)		26°C
(79°F)		14°C
(58°F)		3°C
(37°F)
Mean maximum-1°C
(30°F)		5°C
(42°F)		14°C
(57°F)		24°C
(75°F)		30°C
(86°F)		30°C
(87°F)		34°C
(93°F)		31°C
(88°F)		27°C
(80°F)		19°C
(67°F)		11°C
(52°F)		-0°C
(32°F)
Average high-9°C
(16°F)		-4°C
(24°F)		6°C
(42°F)		14°C
(57°F)		20°C
(69°F)		26°C
(78°F)		27°C
(82°F)		25°C
(77°F)		20°C
(69°F)		10°C
(50°F)		0°C
(33°F)		-8°C
(17°F)
Daily mean-14°C
(7°F)		-10°C
(14°F)		-1°C
(31°F)		8°C
(46°F)		15°C
(58°F)		20°C
(69°F)		22°C
(73°F)		20°C
(68°F)		15°C
(58°F)		4°C
(39°F)		-5°C
(24°F)		-13°C
(9°F)
Average low-18°C
(0°F)		-15°C
(5°F)		-6°C
(21°F)		2°C
(35°F)		8°C
(47°F)		14°C
(58°F)		17°C
(63°F)		15°C
(59°F)		9°C
(49°F)		-1°C
(30°F)		-9°C
(16°F)		-17°C
(3°F)
Mean minimum-25°C
(-13°F)		-23°C
(-9°F)		-14°C
(6°F)		-7°C
(20°F)		-2°C
(29°F)		8°C
(46°F)		12°C
(54°F)		9°C
(49°F)		1°C
(34°F)		-8°C
(18°F)		-18°C
(-0°F)		-25°C
(-13°F)
Minimum-29°C
(-20°F)		-28°C
(-19°F)		-17°C
(2°F)		-9°C
(17°F)		-6°C
(22°F)		2°C
(36°F)		10°C
(51°F)		7°C
(45°F)		-4°C
(25°F)		-11°C
(12°F)		-19°C
(-2°F)		-29°C
(-20°F)

Compare climate in Bayan Uula Sumu with other places

Compare temperature, precipitation, sunshine, UV index in Bayan Uula Sumu, Mongolia with other places around the world.

Monthly average precipitation in Bayan Uula Sumu, Mongolia

Bayan Uula Sumu usually has the most precipitation in July, August and September, with an average of 4 rainy days and 20 mm (0.8 inches) of precipitation per month. The driest months in Bayan Uula Sumu are January, November and December. On average, 2 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Bayan Uula Sumu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)1 (0.1)3 (0.1)8 (0.3)8 (0.3)9 (0.3)9 (0.4)25 (1.0)25 (1.0)11 (0.4)4 (0.1)3 (0.1)2 (0.1)
Average precipitation days (≥ 1 mm)001122553100

Monthly sunshine hours in Bayan Uula Sumu, Mongolia

The sunniest months in Bayan Uula Sumu are May, June and July, when the sun shines an average of 12 hours 9 minutes a day. Least sunny months in Bayan Uula Sumu: January, November and December receive an average of 8 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Bayan Uula Sumu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours211274332338371369377361325312269262
Mean daily daylight hours9h 10m10h 23m11h 55m13h 30m14h 52m15h 33m15h 12m14h 0m12h 29m10h 55m9h 31m8h 48m

Solar UV radiation in Bayan Uula Sumu, Mongolia

Bayan Uula Sumu experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High category of sun exposure. January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Bayan Uula Sumu UV Index data.

Average daily maximum UV levels by month for Bayan Uula Sumu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2368101010107532