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Monthly climate in Ulaan-Uul, Mongolia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ulaan-Uul features a cold desert climate (BWk). Temperatures typically range between -16 °C (4 °F) and 24 °C (76 °F) through the year, but rarely can drop to -35 °C (-30 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 190 mm (7.5 inches) and receives 27 rainy days on the 1 mm (0.04 inches) threshold annually. Ulaan-Uul enjoys an average of 3646 hours of sunshine throughout the year, and daylight varies from 8 hours 53 minutes to 15 hours 27 minutes per day.

Monthly average temperatures in Ulaan-Uul, Mongolia

The warmest months in Ulaan-Uul are June, July and August, with daily mean temperatures ranging from 20 to 24 °C (69 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -16 to -12 °C (4 - 11 °F) throughout the day. On average each year, Ulaan-Uul experiences 70 days above 25 °C (77.0 °F) and 166 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ulaan-Uul. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum1°C
(34°F)		10°C
(50°F)		19°C
(67°F)		30°C
(87°F)		35°C
(95°F)		36°C
(97°F)		38°C
(101°F)		35°C
(95°F)		31°C
(87°F)		29°C
(84°F)		15°C
(60°F)		8°C
(46°F)
Mean maximum-3°C
(27°F)		5°C
(42°F)		16°C
(61°F)		26°C
(80°F)		32°C
(89°F)		33°C
(91°F)		35°C
(96°F)		33°C
(92°F)		28°C
(83°F)		23°C
(74°F)		13°C
(55°F)		-1°C
(30°F)
Average high-11°C
(13°F)		-6°C
(21°F)		6°C
(43°F)		14°C
(58°F)		21°C
(70°F)		27°C
(81°F)		30°C
(86°F)		25°C
(78°F)		22°C
(71°F)		11°C
(52°F)		0°C
(33°F)		-10°C
(14°F)
Daily mean-16°C
(4°F)		-12°C
(11°F)		-1°C
(31°F)		8°C
(46°F)		15°C
(59°F)		21°C
(71°F)		24°C
(76°F)		20°C
(69°F)		16°C
(60°F)		5°C
(41°F)		-5°C
(23°F)		-15°C
(6°F)
Average low-20°C
(-4°F)		-17°C
(2°F)		-7°C
(20°F)		1°C
(34°F)		8°C
(47°F)		15°C
(59°F)		19°C
(66°F)		15°C
(60°F)		10°C
(50°F)		-0°C
(32°F)		-10°C
(15°F)		-19°C
(-1°F)
Mean minimum-28°C
(-17°F)		-25°C
(-12°F)		-15°C
(4°F)		-7°C
(20°F)		-0°C
(31°F)		8°C
(47°F)		13°C
(56°F)		10°C
(50°F)		2°C
(36°F)		-8°C
(18°F)		-20°C
(-3°F)		-28°C
(-17°F)
Minimum-35°C
(-30°F)		-27°C
(-16°F)		-19°C
(-1°F)		-8°C
(17°F)		-3°C
(27°F)		2°C
(37°F)		11°C
(52°F)		7°C
(45°F)		-2°C
(29°F)		-10°C
(15°F)		-24°C
(-11°F)		-33°C
(-27°F)

Compare climate in Ulaan-Uul with other places

Compare temperature, precipitation, sunshine, UV index in Ulaan-Uul, Mongolia with other places around the world.

Monthly average precipitation in Ulaan-Uul, Mongolia

Ulaan-Uul usually has the most precipitation in July, August and September, with an average of 5 rainy days and 42 mm (1.7 inches) of precipitation per month. The driest months in Ulaan-Uul 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 Ulaan-Uul. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)1 (0.0)4 (0.2)6 (0.2)9 (0.4)12 (0.5)14 (0.5)62 (2.5)46 (1.8)18 (0.7)12 (0.5)3 (0.1)2 (0.1)
Average precipitation days (≥ 1 mm)011233663200

Monthly sunshine hours in Ulaan-Uul, Mongolia

The sunniest months in Ulaan-Uul are June, July and August, when the sun shines an average of 11 hours 36 minutes a day. Least sunny months in Ulaan-Uul: January, November and December receive an average of 7 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ulaan-Uul. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours214267316321344350367349307286260258
Mean daily daylight hours9h 15m10h 26m11h 55m13h 28m14h 47m15h 27m15h 6m13h 57m12h 28m10h 57m9h 36m8h 53m

Solar UV radiation in Ulaan-Uul, Mongolia

Ulaan-Uul experiences the highest level of ultraviolet (UV) radiation in June, 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 Ulaan-Uul UV Index data.

Average daily maximum UV levels by month for Ulaan-Uul. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)236791010107532