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Monthly climate in Lanzhou, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Lanzhou features a cold semi-arid climate (BSk). Temperatures typically range between -5 °C (23 °F) and 22 °C (72 °F) through the year, but rarely can drop to -21 °C (-5 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 517 mm (20.4 inches) and receives 81 rainy days on the 1 mm (0.04 inches) threshold annually. Lanzhou enjoys an average of 3490 hours of sunshine throughout the year, and daylight varies from 9 hours 44 minutes to 14 hours 33 minutes per day.

Monthly average temperatures in Lanzhou, China

The warmest months in Lanzhou are June, July and August, with daily mean temperatures ranging from 20 to 22 °C (67 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -2 °C (23 - 29 °F) throughout the day. On average each year, Lanzhou experiences 65 days above 25 °C (77.0 °F) and 124 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Lanzhou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(55°F)		17°C
(63°F)		26°C
(79°F)		31°C
(87°F)		32°C
(90°F)		32°C
(91°F)		36°C
(97°F)		35°C
(95°F)		31°C
(87°F)		27°C
(80°F)		20°C
(69°F)		12°C
(54°F)
Mean maximum9°C
(48°F)		14°C
(58°F)		22°C
(71°F)		26°C
(79°F)		30°C
(87°F)		30°C
(87°F)		34°C
(94°F)		32°C
(90°F)		27°C
(82°F)		23°C
(73°F)		18°C
(64°F)		9°C
(49°F)
Average high1°C
(35°F)		5°C
(42°F)		13°C
(55°F)		17°C
(64°F)		22°C
(72°F)		25°C
(78°F)		28°C
(83°F)		26°C
(78°F)		21°C
(71°F)		15°C
(58°F)		8°C
(47°F)		2°C
(36°F)
Daily mean-5°C
(23°F)		-2°C
(29°F)		6°C
(43°F)		11°C
(52°F)		16°C
(60°F)		20°C
(67°F)		22°C
(72°F)		20°C
(68°F)		16°C
(61°F)		9°C
(48°F)		2°C
(36°F)		-4°C
(25°F)
Average low-10°C
(14°F)		-7°C
(19°F)		-1°C
(31°F)		5°C
(41°F)		10°C
(50°F)		14°C
(58°F)		16°C
(62°F)		15°C
(60°F)		11°C
(53°F)		4°C
(40°F)		-3°C
(27°F)		-8°C
(17°F)
Mean minimum-15°C
(5°F)		-14°C
(7°F)		-7°C
(19°F)		-1°C
(30°F)		4°C
(39°F)		9°C
(49°F)		12°C
(55°F)		11°C
(51°F)		7°C
(45°F)		-0°C
(32°F)		-9°C
(15°F)		-15°C
(6°F)
Minimum-19°C
(-2°F)		-21°C
(-5°F)		-11°C
(13°F)		-6°C
(21°F)		3°C
(37°F)		8°C
(46°F)		11°C
(53°F)		10°C
(50°F)		6°C
(42°F)		-1°C
(30°F)		-13°C
(10°F)		-18°C
(1°F)

Compare climate in Lanzhou with other places

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

Monthly average precipitation in Lanzhou, China

Lanzhou usually has the most precipitation in July, August and September, with an average of 12 rainy days and 92 mm (3.6 inches) of precipitation per month. The driest months in Lanzhou are January, February and December. On average, 6 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Lanzhou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)6 (0.2)7 (0.3)14 (0.5)40 (1.6)51 (2.0)58 (2.3)81 (3.2)125 (4.9)70 (2.8)48 (1.9)12 (0.5)5 (0.2)
Average precipitation days (≥ 1 mm)223979111312931

Monthly sunshine hours in Lanzhou, China

The sunniest months in Lanzhou are May, July and August, when the sun shines an average of 10 hours 40 minutes a day. Least sunny months in Lanzhou: January, October and November receive an average of 8 hours 17 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Lanzhou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours224272306286329310347316285267270273
Mean daily daylight hours9h 59m10h 51m11h 58m13h 6m14h 4m14h 33m14h 18m13h 28m12h 22m11h 14m10h 14m9h 44m

Solar UV radiation in Lanzhou, China

Lanzhou experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure. January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Lanzhou UV Index data.

Average daily maximum UV levels by month for Lanzhou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)358101212121110853