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Monthly climate in Helong, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Helong features a humid continental climate (Dwb). Temperatures typically range between -14 °C (7 °F) and 21 °C (70 °F) through the year, but rarely can drop to -29 °C (-21 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 840 mm (33.1 inches) and receives 112 rainy days on the 1 mm (0.04 inches) threshold annually. Helong enjoys an average of 3252 hours of sunshine throughout the year, and daylight varies from 9 hours 6 minutes to 15 hours 13 minutes per day.

Monthly average temperatures in Helong, China

The warmest months in Helong are June, July and August, with daily mean temperatures ranging from 16 to 21 °C (62 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -14 to -11 °C (7 - 13 °F) throughout the day. On average each year, Helong experiences 38 days above 25 °C (77.0 °F) and 168 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Helong. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum4°C
(39°F)		8°C
(47°F)		22°C
(71°F)		30°C
(87°F)		32°C
(90°F)		31°C
(88°F)		34°C
(93°F)		35°C
(95°F)		27°C
(81°F)		27°C
(81°F)		16°C
(61°F)		5°C
(42°F)
Mean maximum1°C
(33°F)		5°C
(41°F)		15°C
(60°F)		24°C
(75°F)		30°C
(85°F)		27°C
(81°F)		32°C
(89°F)		31°C
(88°F)		25°C
(78°F)		23°C
(73°F)		14°C
(57°F)		3°C
(38°F)
Average high-8°C
(18°F)		-5°C
(23°F)		5°C
(40°F)		13°C
(55°F)		18°C
(65°F)		22°C
(72°F)		26°C
(79°F)		24°C
(76°F)		20°C
(69°F)		13°C
(56°F)		3°C
(37°F)		-6°C
(21°F)
Daily mean-14°C
(7°F)		-11°C
(13°F)		-1°C
(30°F)		6°C
(43°F)		12°C
(54°F)		16°C
(62°F)		21°C
(70°F)		20°C
(68°F)		14°C
(58°F)		6°C
(43°F)		-3°C
(28°F)		-12°C
(11°F)
Average low-19°C
(-2°F)		-17°C
(2°F)		-7°C
(19°F)		-0°C
(32°F)		6°C
(43°F)		11°C
(52°F)		16°C
(62°F)		16°C
(61°F)		9°C
(48°F)		0°C
(32°F)		-7°C
(19°F)		-16°C
(3°F)
Mean minimum-26°C
(-14°F)		-24°C
(-11°F)		-16°C
(3°F)		-6°C
(21°F)		-0°C
(32°F)		7°C
(44°F)		11°C
(52°F)		10°C
(50°F)		2°C
(36°F)		-6°C
(21°F)		-17°C
(1°F)		-25°C
(-12°F)
Minimum-29°C
(-20°F)		-27°C
(-17°F)		-22°C
(-8°F)		-12°C
(11°F)		-1°C
(30°F)		5°C
(41°F)		10°C
(50°F)		5°C
(42°F)		-1°C
(30°F)		-7°C
(20°F)		-21°C
(-6°F)		-29°C
(-21°F)

Compare climate in Helong with other places

Compare temperature, precipitation, sunshine, UV index in Helong, China with other places around the world.

Monthly average precipitation in Helong, China

Helong usually has the most precipitation in June, July and August, with an average of 16 rainy days and 150 mm (5.9 inches) of precipitation per month. The driest months in Helong are January, February and December. On average, 15 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Helong. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)8 (0.3)23 (0.9)34 (1.3)43 (1.7)104 (4.1)118 (4.6)129 (5.1)205 (8.1)86 (3.4)42 (1.7)36 (1.4)14 (0.5)
Average precipitation days (≥ 1 mm)256101617151810652

Monthly sunshine hours in Helong, China

The sunniest months in Helong are May, June and July, when the sun shines an average of 10 hours 21 minutes a day. Least sunny months in Helong: January, November and December receive an average of 7 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Helong. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours195235282287301317334293281261229232
Mean daily daylight hours9h 26m10h 32m11h 56m13h 22m14h 36m15h 13m14h 55m13h 50m12h 27m11h 1m9h 45m9h 6m

Solar UV radiation in Helong, China

Helong experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, November 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 Helong UV Index data.

Average daily maximum UV levels by month for Helong. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)246891011118632