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Monthly climate in Bayansayr, Mongolia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Bayansayr features a cold semi-arid climate (BSk). Temperatures typically range between -15 °C (6 °F) and 23 °C (73 °F) through the year, but rarely can drop to -32 °C (-26 °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. Bayansayr enjoys an average of 3863 hours of sunshine throughout the year, and daylight varies from 8 hours 45 minutes to 15 hours 36 minutes per day.

Monthly average temperatures in Bayansayr, Mongolia

The warmest months in Bayansayr are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (69 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -15 to -10 °C (6 - 14 °F) throughout the day. On average each year, Bayansayr experiences 65 days above 25 °C (77.0 °F) and 172 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Bayansayr. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum1°C
(35°F)		13°C
(56°F)		19°C
(67°F)		28°C
(83°F)		31°C
(89°F)		35°C
(96°F)		37°C
(99°F)		33°C
(91°F)		32°C
(89°F)		26°C
(79°F)		15°C
(59°F)		2°C
(36°F)
Mean maximum-3°C
(27°F)		5°C
(42°F)		14°C
(57°F)		24°C
(76°F)		30°C
(86°F)		31°C
(88°F)		35°C
(95°F)		32°C
(89°F)		28°C
(82°F)		20°C
(68°F)		11°C
(52°F)		-2°C
(29°F)
Average high-10°C
(15°F)		-4°C
(24°F)		6°C
(43°F)		15°C
(58°F)		21°C
(70°F)		26°C
(80°F)		28°C
(82°F)		26°C
(79°F)		21°C
(70°F)		10°C
(51°F)		0°C
(32°F)		-9°C
(16°F)
Daily mean-15°C
(6°F)		-10°C
(14°F)		-1°C
(31°F)		8°C
(47°F)		15°C
(59°F)		21°C
(70°F)		23°C
(73°F)		21°C
(69°F)		14°C
(58°F)		4°C
(39°F)		-6°C
(22°F)		-14°C
(8°F)
Average low-19°C
(-3°F)		-16°C
(4°F)		-7°C
(19°F)		2°C
(35°F)		8°C
(47°F)		15°C
(59°F)		17°C
(63°F)		15°C
(60°F)		8°C
(47°F)		-2°C
(28°F)		-11°C
(13°F)		-18°C
(0°F)
Mean minimum-27°C
(-16°F)		-23°C
(-9°F)		-15°C
(4°F)		-8°C
(19°F)		-2°C
(28°F)		9°C
(48°F)		12°C
(54°F)		10°C
(50°F)		0°C
(33°F)		-9°C
(16°F)		-20°C
(-4°F)		-27°C
(-16°F)
Minimum-30°C
(-21°F)		-28°C
(-19°F)		-17°C
(1°F)		-10°C
(14°F)		-11°C
(12°F)		3°C
(38°F)		9°C
(49°F)		7°C
(45°F)		-4°C
(25°F)		-14°C
(8°F)		-22°C
(-7°F)		-32°C
(-26°F)

Compare climate in Bayansayr with other places

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

Monthly average precipitation in Bayansayr, Mongolia

Bayansayr usually has the most precipitation in July, August and September, with an average of 4 rainy days and 22 mm (0.9 inches) of precipitation per month. The driest months in Bayansayr are January, November and December. On average, 1 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Bayansayr. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)2 (0.1)2 (0.1)5 (0.2)6 (0.2)11 (0.4)11 (0.4)34 (1.3)20 (0.8)12 (0.5)3 (0.1)1 (0.1)1 (0.0)
Average precipitation days (≥ 1 mm)001113553100

Monthly sunshine hours in Bayansayr, Mongolia

The sunniest months in Bayansayr are May, June and July, when the sun shines an average of 12 hours 23 minutes a day. Least sunny months in Bayansayr: January, November and December receive an average of 8 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Bayansayr. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours212276337344379374385366331317272263
Mean daily daylight hours9h 7m10h 21m11h 55m13h 32m14h 54m15h 36m15h 15m14h 2m12h 29m10h 54m9h 29m8h 45m

Solar UV radiation in Bayansayr, Mongolia

Bayansayr 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 Bayansayr UV Index data.

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