Yilan climate — normals and trends
Yilan (China) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 3.3 °C and it receives 605 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (22.4 °C on average) and the coldest is January (-19.2 °C). Rainfall peaks in August.
Yilan averages 184 frost days, 10 hot days (≥ 30 °C) and 95 rainy days per year.
Yilan has warmed by +2.2 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 188 to 180 per year over the period.
The hottest day of the period reached 37.5 °C (on 17 June 2008) and the coldest -42.1 °C (on 22 December 1952).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
YilanHeilongjiang
- coords
- 46.32°, 129.56°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.3°C
Average daily high
8.7°C
Average daily low
-2.0°C
Annual rainfall
605mm
Sunshine / day
9.1h
Mean relative humidity
70%
Average peak wind
15.6km/h
Seasonal range
41.6°C
Frost days (< 0 °C)
184 d/yr
Hot days (≥ 30 °C)
10 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
51.9 cm
Average feels-like high
5.9 °C
Average feels-like low
-5.0 °C
Average peak gust
34.8 km/h
Tropical nights (≥ 20 °C)
11 d/yr
Solar radiation
13.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.47 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
37.5 °C
17 June 2008
Coldest day
-42.1 °C
22 December 1952
Wettest day
135 mm
13 July 1994
Windiest day
51.4 km/h
14 April 1956
Strongest gust
104.0 km/h
14 April 1956
Hottest feels-like
40.9 °C
26 June 2010
Coldest feels-like
-48.4 °C
22 December 1952
Snowiest day
28.8 cm
6 November 2023
Sunniest day
15.0 h
31 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -12.3 °C | +1.5 °C | 3 mm | -3 mm |
| Feb | -8.4 °C | +0.2 °C | 6 mm | -2 mm |
| Mar | 1.9 °C | +1.1 °C | 16 mm | -3 mm |
| Apr | 13.8 °C | +2.0 °C | 31 mm | -7 mm |
| May | 19.8 °C | +0.5 °C | 71 mm | +3 mm |
| Jun | 25.3 °C | +1.1 °C | 130 mm | +39 mm |
| Jul | 29.4 °C | +2.6 °C | 82 mm | -31 mm |
| Aug | 25.9 °C | +0.6 °C | 102 mm | -22 mm |
| Sep | 23.4 °C | +3.5 °C | 42 mm | -23 mm |
| Oct | 9.8 °C | -1.3 °C | 17 mm | -27 mm |
| Nov | 1.4 °C | +2.6 °C | 15 mm | -4 mm |
| Dec | -10.3 °C | +1.1 °C | 14 mm | +4 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Yilan?
Yilan has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 3.3 °C and it receives 605 mm of precipitation per year.
What is the hottest day ever recorded in Yilan?
The hottest day measured in Yilan between 1940 and 2025 was 17 June 2008, reaching 37.5 °C.
What is the coldest day in Yilan?
The coldest day measured in Yilan between 1940 and 2025 was 22 December 1952, at -42.1 °C.
Does it snow in Yilan?
Yes. Yilan gets on average 51.9 cm of snow per year and has around 184 frost days.
Has the climate of Yilan warmed?
Yes: Yilan warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Yilan?
The wettest day measured in Yilan between 1940 and 2025 was 13 July 1994, with 135 mm of rain in 24 hours.
What was the windiest day in Yilan?
The windiest day measured in Yilan between 1940 and 2025 was 14 April 1956, with winds reaching 51.4 km/h.
What is the warmest month in Yilan?
The warmest month in Yilan is July (22.4 °C on average); the coldest is January (-19.2 °C).
How much does it rain in Yilan?
Yilan receives on average 605 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Yilan?
Yilan gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Yilan?
The heaviest 24-hour snowfall measured in Yilan between 1940 and 2025 was 6 November 2023, with 28.8 cm.
Are there tropical nights in Yilan?
Yes: Yilan has on average 11 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Yilan?
In Yilan, between 1940 and 2025, the highest apparent temperature reached 40.9 °C on 26 June 2010, and the lowest was -48.4 °C on 22 December 1952.
Compare Yilan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Yilan