nomadseason

Monthly climate in Altai, Mongolia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Altai features a cold semi-arid climate (BSk). Temperatures typically range between -17 °C (2 °F) and 17 °C (64 °F) through the year, but rarely can drop to -35 °C (-30 °F) or can rise to as high as 31 °C (87 °F). The average annual precipitation amounts to about 230 mm (9.1 inches) and receives 50 rainy days on the 1 mm (0.04 inches) threshold annually. Altai enjoys an average of 3912 hours of sunshine throughout the year, and daylight varies from 8 hours 38 minutes to 15 hours 43 minutes per day.

Monthly average temperatures in Altai, Mongolia

The warmest months in Altai are June, July and August, with daily mean temperatures ranging from 15 to 17 °C (59 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -17 to -13 °C (2 - 10 °F) throughout the day. On average each year, Altai experiences 11 days above 25 °C (77.0 °F) and 195 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Altai. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum-2°C
(29°F)		6°C
(43°F)		13°C
(56°F)		22°C
(72°F)		24°C
(76°F)		29°C
(84°F)		31°C
(87°F)		27°C
(82°F)		26°C
(80°F)		19°C
(66°F)		11°C
(53°F)		0°C
(33°F)
Mean maximum-5°C
(24°F)		1°C
(35°F)		9°C
(48°F)		18°C
(64°F)		24°C
(75°F)		25°C
(78°F)		28°C
(82°F)		25°C
(78°F)		22°C
(71°F)		14°C
(57°F)		8°C
(46°F)		-1°C
(30°F)
Average high-12°C
(10°F)		-8°C
(19°F)		1°C
(34°F)		9°C
(48°F)		15°C
(59°F)		20°C
(69°F)		22°C
(72°F)		20°C
(68°F)		15°C
(59°F)		6°C
(43°F)		-3°C
(27°F)		-11°C
(13°F)
Daily mean-17°C
(2°F)		-13°C
(10°F)		-4°C
(24°F)		3°C
(38°F)		10°C
(49°F)		15°C
(60°F)		17°C
(64°F)		15°C
(59°F)		9°C
(49°F)		0°C
(33°F)		-7°C
(19°F)		-15°C
(5°F)
Average low-20°C
(-4°F)		-17°C
(2°F)		-10°C
(15°F)		-2°C
(29°F)		3°C
(39°F)		10°C
(49°F)		12°C
(54°F)		10°C
(50°F)		4°C
(40°F)		-4°C
(25°F)		-11°C
(12°F)		-19°C
(-1°F)
Mean minimum-29°C
(-20°F)		-25°C
(-12°F)		-17°C
(1°F)		-11°C
(12°F)		-7°C
(20°F)		3°C
(38°F)		7°C
(45°F)		4°C
(40°F)		-4°C
(25°F)		-11°C
(12°F)		-21°C
(-6°F)		-27°C
(-17°F)
Minimum-35°C
(-30°F)		-27°C
(-17°F)		-20°C
(-4°F)		-16°C
(4°F)		-11°C
(12°F)		-1°C
(30°F)		4°C
(40°F)		1°C
(34°F)		-7°C
(19°F)		-15°C
(5°F)		-25°C
(-13°F)		-31°C
(-24°F)

Compare climate in Altai with other places

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

Monthly average precipitation in Altai, Mongolia

Altai usually has the most precipitation in June, July and August, with an average of 8 rainy days and 45 mm (1.8 inches) of precipitation per month. The driest months in Altai are January, February and December. On average, 4 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Altai. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)3 (0.1)6 (0.2)10 (0.4)17 (0.7)19 (0.8)27 (1.1)42 (1.6)66 (2.6)19 (0.8)10 (0.4)7 (0.3)4 (0.2)
Average precipitation days (≥ 1 mm)013468994411

Monthly sunshine hours in Altai, Mongolia

The sunniest months in Altai are May, June and July, when the sun shines an average of 12 hours 39 minutes a day. Least sunny months in Altai: 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 Altai. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours210275342353384382397373338321273259
Mean daily daylight hours9h 2m10h 18m11h 55m13h 34m14h 59m15h 43m15h 21m14h 5m12h 30m10h 52m9h 24m8h 38m

Solar UV radiation in Altai, Mongolia

Altai 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 Altai UV Index data.

Average daily maximum UV levels by month for Altai. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2379101010107532