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Monthly climate in Bayanhongor, Mongolia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Bayanhongor features a cold semi-arid climate (BSk). Temperatures typically range between -19 °C (-2 °F) and 17 °C (62 °F) through the year, but rarely can drop to -40 °C (-40 °F) or can rise to as high as 30 °C (87 °F). The average annual precipitation amounts to about 232 mm (9.1 inches) and receives 39 rainy days on the 1 mm (0.04 inches) threshold annually. Bayanhongor enjoys an average of 3852 hours of sunshine throughout the year, and daylight varies from 8 hours 40 minutes to 15 hours 41 minutes per day.

Monthly average temperatures in Bayanhongor, Mongolia

The warmest months in Bayanhongor are June, July and August, with daily mean temperatures ranging from 14 to 17 °C (58 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -19 to -15 °C (-2 - 5 °F) throughout the day. On average each year, Bayanhongor experiences 8 days above 25 °C (77.0 °F) and 205 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Bayanhongor. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum-3°C
(27°F)		7°C
(45°F)		13°C
(56°F)		23°C
(73°F)		25°C
(78°F)		30°C
(86°F)		30°C
(87°F)		26°C
(79°F)		25°C
(77°F)		19°C
(66°F)		10°C
(50°F)		-1°C
(31°F)
Mean maximum-5°C
(24°F)		1°C
(34°F)		8°C
(47°F)		19°C
(66°F)		24°C
(76°F)		25°C
(78°F)		27°C
(82°F)		24°C
(76°F)		21°C
(70°F)		13°C
(56°F)		7°C
(44°F)		-4°C
(26°F)
Average high-12°C
(11°F)		-8°C
(17°F)		1°C
(34°F)		9°C
(49°F)		15°C
(60°F)		21°C
(69°F)		22°C
(72°F)		19°C
(67°F)		15°C
(60°F)		6°C
(42°F)		-4°C
(26°F)		-11°C
(12°F)
Daily mean-19°C
(-2°F)		-15°C
(5°F)		-6°C
(22°F)		3°C
(38°F)		9°C
(49°F)		15°C
(59°F)		17°C
(62°F)		14°C
(58°F)		9°C
(48°F)		-1°C
(31°F)		-10°C
(15°F)		-18°C
(-0°F)
Average low-25°C
(-12°F)		-22°C
(-7°F)		-12°C
(10°F)		-3°C
(26°F)		2°C
(35°F)		8°C
(46°F)		11°C
(52°F)		9°C
(48°F)		3°C
(38°F)		-6°C
(21°F)		-15°C
(5°F)		-23°C
(-9°F)
Mean minimum-31°C
(-24°F)		-30°C
(-23°F)		-22°C
(-8°F)		-12°C
(11°F)		-6°C
(21°F)		2°C
(35°F)		6°C
(42°F)		3°C
(38°F)		-5°C
(24°F)		-12°C
(10°F)		-26°C
(-14°F)		-31°C
(-24°F)
Minimum-37°C
(-34°F)		-34°C
(-30°F)		-24°C
(-12°F)		-15°C
(6°F)		-8°C
(17°F)		-1°C
(30°F)		4°C
(39°F)		-0°C
(32°F)		-9°C
(17°F)		-15°C
(5°F)		-32°C
(-25°F)		-40°C
(-40°F)

Compare climate in Bayanhongor with other places

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

Monthly average precipitation in Bayanhongor, Mongolia

Bayanhongor usually has the most precipitation in June, July and August, with an average of 8 rainy days and 50 mm (2.0 inches) of precipitation per month. The driest months in Bayanhongor are January, February and December. On average, 3 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Bayanhongor. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)2 (0.1)4 (0.2)10 (0.4)14 (0.5)16 (0.6)27 (1.1)61 (2.4)63 (2.5)20 (0.8)7 (0.3)6 (0.2)2 (0.1)
Average precipitation days (≥ 1 mm)0122451094110

Monthly sunshine hours in Bayanhongor, Mongolia

The sunniest months in Bayanhongor are May, June and July, when the sun shines an average of 12 hours 24 minutes a day. Least sunny months in Bayanhongor: 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 Bayanhongor. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours213277333343378377385363327316272263
Mean daily daylight hours9h 3m10h 19m11h 55m13h 34m14h 58m15h 41m15h 19m14h 5m12h 30m10h 52m9h 25m8h 40m

Solar UV radiation in Bayanhongor, Mongolia

Bayanhongor 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 Bayanhongor UV Index data.

Average daily maximum UV levels by month for Bayanhongor. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2369101010107532