Weidian climate — normals and trends
Weidian (China) has a warm-summer humid continental, dry winter climate (Dwb) under the Köppen-Geiger classification. Its mean annual temperature is 9.0 °C and it receives 746 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 (21.0 °C on average) and the coldest is January (-4.5 °C). Rainfall peaks in August.
Weidian averages 127 frost days, 6 hot days (≥ 30 °C) and 110 rainy days per year.
Weidian has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 135 to 119 per year over the period.
The hottest day of the period reached 34.9 °C (on 31 July 2021) and the coldest -26.6 °C (on 20 February 1955).
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
WeidianGansu
- coords
- 35.10°, 105.57°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.0°C
Average daily high
14.2°C
Average daily low
4.4°C
Annual rainfall
746mm
Sunshine / day
8.4h
Mean relative humidity
68%
Average peak wind
14.6km/h
Seasonal range
25.5°C
Frost days (< 0 °C)
127 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
110 d/yr
Annual snowfall
39.6 cm
Average feels-like high
12.1 °C
Average feels-like low
2.0 °C
Average peak gust
32.5 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.52 · 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
34.9 °C
31 July 2021
Coldest day
-26.6 °C
20 February 1955
Wettest day
121 mm
22 July 1946
Windiest day
51.1 km/h
31 May 1946
Strongest gust
98.3 km/h
31 May 1946
Hottest feels-like
36.7 °C
4 August 2002
Coldest feels-like
-31.8 °C
15 December 1975
Snowiest day
11.1 cm
18 November 1961
Sunniest day
14.0 h
28 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 | 3.5 °C | +2.8 °C | 19 mm | +9 mm |
| Feb | 3.7 °C | +0.1 °C | 17 mm | +2 mm |
| Mar | 10.5 °C | +0.3 °C | 12 mm | -18 mm |
| Apr | 19.7 °C | +3.6 °C | 11 mm | -38 mm |
| May | 24.4 °C | +3.9 °C | 43 mm | -28 mm |
| Jun | 26.3 °C | +2.1 °C | 76 mm | -10 mm |
| Jul | 27.8 °C | +1.7 °C | 101 mm | -30 mm |
| Aug | 26.7 °C | +1.8 °C | 122 mm | -13 mm |
| Sep | 21.1 °C | +1.4 °C | 109 mm | -8 mm |
| Oct | 13.5 °C | -0.8 °C | 187 mm | +118 mm |
| Nov | 9.2 °C | +1.1 °C | 26 mm | +2 mm |
| Dec | 4.9 °C | +2.7 °C | 11 mm | +3 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 Weidian?
Weidian has a warm-summer humid continental, dry winter climate (Köppen Dwb). Over 1940-2025, the average annual temperature is 9.0 °C and it receives 746 mm of precipitation per year.
What is the hottest day ever recorded in Weidian?
The hottest day measured in Weidian between 1940 and 2025 was 31 July 2021, reaching 34.9 °C.
What is the coldest day in Weidian?
The coldest day measured in Weidian between 1940 and 2025 was 20 February 1955, at -26.6 °C.
Does it snow in Weidian?
Yes. Weidian gets on average 39.6 cm of snow per year and has around 127 frost days.
Has the climate of Weidian warmed?
Yes: Weidian warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Weidian?
The wettest day measured in Weidian between 1940 and 2025 was 22 July 1946, with 121 mm of rain in 24 hours.
What was the windiest day in Weidian?
The windiest day measured in Weidian between 1940 and 2025 was 31 May 1946, with winds reaching 51.1 km/h.
What is the warmest month in Weidian?
The warmest month in Weidian is July (21.0 °C on average); the coldest is January (-4.5 °C).
How much does it rain in Weidian?
Weidian receives on average 746 mm of precipitation per year, spread over about 110 rainy days.
Is it sunny in Weidian?
Weidian gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Weidian?
The heaviest 24-hour snowfall measured in Weidian between 1940 and 2025 was 18 November 1961, with 11.1 cm.
Are there tropical nights in Weidian?
Yes: Weidian has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Weidian?
In Weidian, between 1940 and 2025, the highest apparent temperature reached 36.7 °C on 4 August 2002, and the lowest was -31.8 °C on 15 December 1975.
Compare Weidian with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Weidian