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Monthly climate in Ongon, Mongolia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ongon features a cold semi-arid climate (BSk). Temperatures typically range between -19 °C (-2 °F) and 19 °C (67 °F) through the year, but rarely can drop to -39 °C (-39 °F) or can rise to as high as 36 °C (96 °F). The average annual precipitation amounts to about 288 mm (11.3 inches) and receives 52 rainy days on the 1 mm (0.04 inches) threshold annually. Ongon enjoys an average of 3795 hours of sunshine throughout the year, and daylight varies from 8 hours 34 minutes to 15 hours 48 minutes per day.

Monthly average temperatures in Ongon, Mongolia

The warmest months in Ongon are June, July and August, with daily mean temperatures ranging from 16 to 19 °C (62 - 67 °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, Ongon experiences 31 days above 25 °C (77.0 °F) and 196 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ongon. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum0°C
(33°F)		11°C
(52°F)		18°C
(65°F)		27°C
(81°F)		31°C
(88°F)		34°C
(94°F)		36°C
(96°F)		30°C
(87°F)		29°C
(85°F)		24°C
(75°F)		13°C
(56°F)		7°C
(44°F)
Mean maximum-3°C
(27°F)		3°C
(37°F)		12°C
(55°F)		22°C
(72°F)		28°C
(83°F)		30°C
(85°F)		32°C
(90°F)		29°C
(84°F)		25°C
(78°F)		18°C
(65°F)		11°C
(52°F)		-1°C
(31°F)
Average high-12°C
(10°F)		-8°C
(18°F)		2°C
(36°F)		10°C
(51°F)		17°C
(64°F)		23°C
(73°F)		24°C
(76°F)		21°C
(71°F)		18°C
(64°F)		8°C
(47°F)		-2°C
(28°F)		-11°C
(12°F)
Daily mean-19°C
(-2°F)		-15°C
(5°F)		-5°C
(24°F)		4°C
(39°F)		11°C
(52°F)		17°C
(63°F)		19°C
(67°F)		16°C
(62°F)		11°C
(52°F)		1°C
(34°F)		-8°C
(17°F)		-18°C
(1°F)
Average low-25°C
(-13°F)		-21°C
(-6°F)		-11°C
(12°F)		-3°C
(27°F)		3°C
(38°F)		10°C
(51°F)		14°C
(57°F)		11°C
(53°F)		6°C
(42°F)		-4°C
(24°F)		-13°C
(8°F)		-23°C
(-9°F)
Mean minimum-35°C
(-30°F)		-31°C
(-24°F)		-22°C
(-6°F)		-12°C
(11°F)		-5°C
(22°F)		3°C
(38°F)		8°C
(47°F)		7°C
(44°F)		-1°C
(30°F)		-12°C
(10°F)		-25°C
(-13°F)		-33°C
(-27°F)
Minimum-39°C
(-39°F)		-36°C
(-32°F)		-26°C
(-15°F)		-18°C
(-1°F)		-11°C
(12°F)		1°C
(34°F)		7°C
(44°F)		5°C
(41°F)		-6°C
(21°F)		-16°C
(3°F)		-33°C
(-26°F)		-35°C
(-31°F)

Compare climate in Ongon with other places

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

Monthly average precipitation in Ongon, Mongolia

Ongon usually has the most precipitation in July, August and September, with an average of 9 rainy days and 56 mm (2.2 inches) of precipitation per month. The driest months in Ongon 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 Ongon. 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)7 (0.3)16 (0.6)22 (0.9)33 (1.3)52 (2.1)78 (3.1)40 (1.6)15 (0.6)12 (0.5)5 (0.2)
Average precipitation days (≥ 1 mm)11234710126321

Monthly sunshine hours in Ongon, Mongolia

The sunniest months in Ongon are May, June and July, when the sun shines an average of 12 hours 16 minutes a day. Least sunny months in Ongon: January, November and December receive an average of 7 hours 59 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ongon. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours209271332338377369381359322307267258
Mean daily daylight hours8h 58m10h 16m11h 55m13h 36m15h 3m15h 48m15h 25m14h 8m12h 31m10h 50m9h 21m8h 34m

Solar UV radiation in Ongon, Mongolia

Ongon experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 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 Ongon UV Index data.

Average daily maximum UV levels by month for Ongon. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2357910997532