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Monthly climate in Longmen, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Longmen features a humid subtropical climate (Cfa). Temperatures typically range between 12 °C (54 °F) and 26 °C (80 °F) through the year, but rarely can drop to -3 °C (27 °F) or can rise to as high as 36 °C (98 °F). The average annual precipitation amounts to about 1525 mm (60.0 inches) and receives 163 rainy days on the 1 mm (0.04 inches) threshold annually. Longmen enjoys an average of 2877 hours of sunshine throughout the year, and daylight varies from 10 hours 35 minutes to 13 hours 39 minutes per day.

Monthly average temperatures in Longmen, China

The warmest months in Longmen are July, August and September, with daily mean temperatures ranging from 25 to 26 °C (77 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 13 °C (54 - 55 °F) throughout the day. On average each year, Longmen experiences 159 days above 25 °C (77.0 °F) and 3 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Longmen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum25°C
(78°F)		26°C
(80°F)		28°C
(82°F)		31°C
(88°F)		34°C
(93°F)		34°C
(93°F)		36°C
(96°F)		36°C
(98°F)		36°C
(97°F)		34°C
(93°F)		29°C
(84°F)		27°C
(81°F)
Mean maximum23°C
(74°F)		24°C
(76°F)		27°C
(80°F)		29°C
(85°F)		31°C
(89°F)		32°C
(90°F)		35°C
(95°F)		34°C
(94°F)		34°C
(93°F)		32°C
(89°F)		28°C
(82°F)		24°C
(76°F)
Average high17°C
(63°F)		17°C
(63°F)		20°C
(69°F)		23°C
(74°F)		27°C
(80°F)		28°C
(84°F)		31°C
(88°F)		31°C
(88°F)		30°C
(86°F)		26°C
(79°F)		22°C
(72°F)		18°C
(64°F)
Daily mean12°C
(54°F)		13°C
(55°F)		16°C
(61°F)		19°C
(66°F)		23°C
(73°F)		25°C
(77°F)		26°C
(80°F)		26°C
(79°F)		25°C
(77°F)		21°C
(71°F)		17°C
(63°F)		13°C
(55°F)
Average low8°C
(47°F)		9°C
(48°F)		12°C
(55°F)		15°C
(60°F)		19°C
(67°F)		22°C
(72°F)		23°C
(73°F)		23°C
(73°F)		21°C
(71°F)		18°C
(64°F)		13°C
(56°F)		9°C
(49°F)
Mean minimum1°C
(34°F)		3°C
(37°F)		6°C
(42°F)		8°C
(46°F)		14°C
(57°F)		20°C
(68°F)		21°C
(70°F)		21°C
(70°F)		18°C
(65°F)		12°C
(53°F)		8°C
(47°F)		2°C
(36°F)
Minimum-3°C
(27°F)		-2°C
(28°F)		3°C
(37°F)		4°C
(39°F)		10°C
(51°F)		18°C
(65°F)		21°C
(69°F)		20°C
(69°F)		16°C
(61°F)		9°C
(48°F)		5°C
(41°F)		2°C
(35°F)

Compare climate in Longmen with other places

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

Monthly average precipitation in Longmen, China

Longmen usually has the most precipitation in May, June and August, with an average of 20 rainy days and 247 mm (9.7 inches) of precipitation per month. The driest months in Longmen are January, November and December. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Longmen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)45 (1.8)81 (3.2)157 (6.2)145 (5.7)209 (8.2)322 (12.7)118 (4.7)211 (8.3)104 (4.1)55 (2.2)48 (1.9)30 (1.2)
Average precipitation days (≥ 1 mm)51018161923182013885

Monthly sunshine hours in Longmen, China

The sunniest months in Longmen are May, July and August, when the sun shines an average of 9 hours 21 minutes a day. Least sunny months in Longmen: January, February and March receive an average of 6 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Longmen. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours190205211219274222302293274234220227
Mean daily daylight hours10h 45m11h 17m12h 0m12h 44m13h 21m13h 39m13h 30m12h 58m12h 16m11h 32m10h 54m10h 35m

Solar UV radiation in Longmen, China

Longmen experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 13 - 13, which corresponds to the Extreme category of sun exposure. January, February and December are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Longmen UV Index data.

Average daily maximum UV levels by month for Longmen. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)79121213131313121097