Yùmén climate — normals and trends
Yùmén (China) has a cold desert climate (BWk) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 76 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 (23.8 °C on average) and the coldest is January (-9.3 °C). Rainfall peaks in August.
Yùmén averages 162 frost days, 38 hot days (≥ 30 °C) and 18 rainy days per year.
No statistically significant temperature trend emerges for Yùmén between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 39.9 °C (on 16 July 1944) and the coldest -32.2 °C (on 14 January 1958).
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
YùménGansu
- coords
- 40.29°, 97.05°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
14.6°C
Average daily low
2.0°C
Annual rainfall
76mm
Sunshine / day
10.7h
Mean relative humidity
36%
Average peak wind
23.1km/h
Seasonal range
33.1°C
Frost days (< 0 °C)
162 d/yr
Hot days (≥ 30 °C)
38 d/yr
Rainy days (≥ 1 mm)
18 d/yr
Annual snowfall
14.4 cm
Average feels-like high
9.8 °C
Average feels-like low
-2.5 °C
Average peak gust
41.0 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
18.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
No clear trend over this period
Over a short window, year-to-year swings outweigh the climate signal. Try 86 years.
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
39.9 °C
16 July 1944
Coldest day
-32.2 °C
14 January 1958
Wettest day
79 mm
24 August 1955
Windiest day
68.8 km/h
19 May 1986
Strongest gust
112.7 km/h
19 May 1986
Hottest feels-like
37.9 °C
27 July 2010
Coldest feels-like
-38.6 °C
14 January 1958
Snowiest day
11.7 cm
16 March 1966
Sunniest day
14.8 h
14 June 1941
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 | -0.6 °C | +2.4 °C | 3 mm | +1 mm |
| Feb | 2.2 °C | +0.8 °C | 1 mm | -2 mm |
| Mar | 9.1 °C | -0.4 °C | 5 mm | -2 mm |
| Apr | 19.0 °C | +1.8 °C | 5 mm | -0 mm |
| May | 24.6 °C | +1.5 °C | 6 mm | -1 mm |
| Jun | 28.4 °C | +0.7 °C | 10 mm | +1 mm |
| Jul | 30.9 °C | +1.1 °C | 17 mm | +4 mm |
| Aug | 28.8 °C | +0.4 °C | 30 mm | +15 mm |
| Sep | 24.0 °C | +1.0 °C | 2 mm | -3 mm |
| Oct | 14.4 °C | -0.7 °C | 1 mm | -1 mm |
| Nov | 6.5 °C | +1.2 °C | 4 mm | +1 mm |
| Dec | 0.7 °C | +2.6 °C | 8 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 Yùmén?
Yùmén has a cold desert climate (Köppen BWk). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 76 mm of precipitation per year.
What is the hottest day ever recorded in Yùmén?
The hottest day measured in Yùmén between 1940 and 2025 was 16 July 1944, reaching 39.9 °C.
What is the coldest day in Yùmén?
The coldest day measured in Yùmén between 1940 and 2025 was 14 January 1958, at -32.2 °C.
Does it snow in Yùmén?
Yes. Yùmén gets on average 14.4 cm of snow per year and has around 162 frost days.
Has the climate of Yùmén warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in Yùmén.
What is the wettest day in Yùmén?
The wettest day measured in Yùmén between 1940 and 2025 was 24 August 1955, with 79 mm of rain in 24 hours.
What was the windiest day in Yùmén?
The windiest day measured in Yùmén between 1940 and 2025 was 19 May 1986, with winds reaching 68.8 km/h.
What is the warmest month in Yùmén?
The warmest month in Yùmén is July (23.8 °C on average); the coldest is January (-9.3 °C).
How much does it rain in Yùmén?
Yùmén receives on average 76 mm of precipitation per year, spread over about 18 rainy days.
Is it sunny in Yùmén?
Yùmén gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
What is the biggest single-day snowfall in Yùmén?
The heaviest 24-hour snowfall measured in Yùmén between 1940 and 2025 was 16 March 1966, with 11.7 cm.
Are there tropical nights in Yùmén?
Yes: Yùmén has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Yùmén?
In Yùmén, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 27 July 2010, and the lowest was -38.6 °C on 14 January 1958.
Compare Yùmén with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Yùmén