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Monthly climate in Yilan, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Yilan features a humid continental climate (Dwb). Temperatures typically range between -17 °C (1 °F) and 24 °C (75 °F) through the year, but rarely can drop to -37 °C (-35 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 656 mm (25.8 inches) and receives 90 rainy days on the 1 mm (0.04 inches) threshold annually. Yilan enjoys an average of 3169 hours of sunshine throughout the year, and daylight varies from 8 hours 39 minutes to 15 hours 43 minutes per day.

Monthly average temperatures in Yilan, China

The warmest months in Yilan are June, July and August, with daily mean temperatures ranging from 19 to 24 °C (66 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -17 to -13 °C (1 - 8 °F) throughout the day. On average each year, Yilan experiences 53 days above 25 °C (77.0 °F) and 166 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Yilan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum-2°C
(29°F)		6°C
(43°F)		18°C
(64°F)		25°C
(78°F)		31°C
(89°F)		33°C
(91°F)		35°C
(96°F)		32°C
(89°F)		28°C
(83°F)		28°C
(83°F)		13°C
(56°F)		7°C
(45°F)
Mean maximum-4°C
(24°F)		2°C
(37°F)		13°C
(56°F)		24°C
(75°F)		30°C
(86°F)		28°C
(83°F)		33°C
(92°F)		31°C
(87°F)		27°C
(80°F)		23°C
(74°F)		11°C
(53°F)		0°C
(32°F)
Average high-12°C
(11°F)		-7°C
(19°F)		3°C
(38°F)		13°C
(56°F)		20°C
(69°F)		24°C
(75°F)		28°C
(83°F)		25°C
(77°F)		21°C
(70°F)		13°C
(55°F)		0°C
(33°F)		-11°C
(13°F)
Daily mean-17°C
(1°F)		-13°C
(8°F)		-3°C
(28°F)		7°C
(45°F)		14°C
(58°F)		19°C
(66°F)		24°C
(75°F)		21°C
(69°F)		15°C
(59°F)		6°C
(44°F)		-4°C
(25°F)		-15°C
(5°F)
Average low-22°C
(-7°F)		-19°C
(-2°F)		-9°C
(17°F)		0°C
(33°F)		8°C
(47°F)		14°C
(58°F)		19°C
(67°F)		17°C
(63°F)		10°C
(50°F)		1°C
(33°F)		-8°C
(17°F)		-19°C
(-2°F)
Mean minimum-28°C
(-18°F)		-28°C
(-18°F)		-20°C
(-4°F)		-6°C
(22°F)		2°C
(35°F)		9°C
(49°F)		14°C
(58°F)		11°C
(52°F)		3°C
(37°F)		-6°C
(22°F)		-17°C
(1°F)		-26°C
(-14°F)
Minimum-37°C
(-35°F)		-32°C
(-25°F)		-26°C
(-15°F)		-9°C
(16°F)		0°C
(33°F)		7°C
(45°F)		13°C
(55°F)		8°C
(46°F)		1°C
(34°F)		-8°C
(18°F)		-21°C
(-5°F)		-29°C
(-20°F)

Compare climate in Yilan with other places

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

Monthly average precipitation in Yilan, China

Yilan usually has the most precipitation in June, August and September, with an average of 13 rainy days and 119 mm (4.7 inches) of precipitation per month. The driest months in Yilan are January, February and December. On average, 8 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Yilan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)5 (0.2)8 (0.3)22 (0.9)34 (1.4)78 (3.1)103 (4.1)87 (3.4)162 (6.4)92 (3.6)22 (0.9)31 (1.2)10 (0.4)
Average precipitation days (≥ 1 mm)12471215131410552

Monthly sunshine hours in Yilan, China

The sunniest months in Yilan are May, June and July, when the sun shines an average of 10 hours 22 minutes a day. Least sunny months in Yilan: January, November and December receive an average of 6 hours 42 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Yilan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours183234274284310316327273275255212221
Mean daily daylight hours9h 2m10h 18m11h 55m13h 34m14h 59m15h 43m15h 20m14h 6m12h 30m10h 52m9h 25m8h 39m

Solar UV radiation in Yilan, China

Yilan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Yilan UV Index data.

Average daily maximum UV levels by month for Yilan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235689986422