Bayan Nur climate — normals and trends
Bayan Nur has a cold semi-arid climate, averaging 8.5 °C annually with 229 mm of rain per year.
Climate normals · ERA5
Bayan NurInner Mongolia
- coords
- 40.74°, 107.39°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
8.5°C
Average daily high
15.0°C
Average daily low
2.5°C
Annual rainfall
229mm
Sunshine / day
10.4h
Mean relative humidity
43%
Average peak wind
18.4km/h
Seasonal range
35.3°C
Frost days (< 0 °C)
160 d/yr
Hot days (≥ 30 °C)
50 d/yr
Rainy days (≥ 1 mm)
32 d/yr
Annual snowfall
6.3 cm
Average feels-like high
11.3 °C
Average feels-like low
-1.2 °C
Average peak gust
34.2 km/h
Tropical nights (≥ 20 °C)
20 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.06 · p = 0.030
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
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
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
43.0 °C
14 July 1944
Coldest day
-35.1 °C
10 December 1967
Wettest day
89 mm
7 June 1946
Windiest day
54.2 km/h
23 April 2009
Strongest gust
92.2 km/h
23 April 2009
Hottest feels-like
42.2 °C
28 July 1999
Coldest feels-like
-40.2 °C
10 December 1967
Snowiest day
7.1 cm
10 March 1980
Sunniest day
14.0 h
23 June 1949
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -1.0 °C | +2.7 °C | 6 mm | +5 mm |
| Feb | 1.0 °C | -0.1 °C | 0 mm | -2 mm |
| Mar | 10.7 °C | +1.5 °C | 5 mm | -1 mm |
| Apr | 19.5 °C | +1.9 °C | 1 mm | -9 mm |
| May | 24.5 °C | -0.1 °C | 42 mm | +24 mm |
| Jun | 29.8 °C | +0.5 °C | 15 mm | -15 mm |
| Jul | 30.9 °C | -0.1 °C | 108 mm | +50 mm |
| Aug | 29.7 °C | +1.0 °C | 38 mm | -21 mm |
| Sep | 25.5 °C | +1.9 °C | 13 mm | -14 mm |
| Oct | 15.5 °C | -0.4 °C | 8 mm | -4 mm |
| Nov | 8.2 °C | +2.7 °C | 11 mm | +7 mm |
| Dec | 0.3 °C | +2.9 °C | 1 mm | -0 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Climate at a glance
What these normals say about the place, in a few sentences, and the notions needed to read them.
Bayan Nur (China) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 8.5 °C and it receives 229 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 (25.1 °C on average) and the coldest is January (-10.2 °C). Rainfall peaks in August.
Bayan Nur averages 160 frost days, 50 hot days (≥ 30 °C) and 32 rainy days per year.
Bayan Nur has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.
The number of frost days there went from about 167 to 153 per year over the period.
The hottest day of the period reached 43.0 °C (on 14 July 1944) and the coldest -35.1 °C (on 10 December 1967).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Compare Bayan Nur with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bayan Nur
Other cities — China
Frequently asked questions
What is the climate of Bayan Nur?
Bayan Nur has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 8.5 °C and it receives 229 mm of precipitation per year.
What is the hottest day ever recorded in Bayan Nur?
The hottest day measured in Bayan Nur between 1940 and 2025 was 14 July 1944, reaching 43.0 °C.
What is the coldest day in Bayan Nur?
The coldest day measured in Bayan Nur between 1940 and 2025 was 10 December 1967, at -35.1 °C.
Does it snow in Bayan Nur?
Yes. Bayan Nur gets on average 6.3 cm of snow per year and has around 160 frost days.
Has the climate of Bayan Nur warmed?
Yes: Bayan Nur warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bayan Nur?
The wettest day measured in Bayan Nur between 1940 and 2025 was 7 June 1946, with 89 mm of rain in 24 hours.
What was the windiest day in Bayan Nur?
The windiest day measured in Bayan Nur between 1940 and 2025 was 23 April 2009, with winds reaching 54.2 km/h.
What is the warmest month in Bayan Nur?
The warmest month in Bayan Nur is July (25.1 °C on average); the coldest is January (-10.2 °C).
How much does it rain in Bayan Nur?
Bayan Nur receives on average 229 mm of precipitation per year, spread over about 32 rainy days.
Is it sunny in Bayan Nur?
Bayan Nur gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bayan Nur?
The heaviest 24-hour snowfall measured in Bayan Nur between 1940 and 2025 was 10 March 1980, with 7.1 cm.
Are there tropical nights in Bayan Nur?
Yes: Bayan Nur has on average 20 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bayan Nur?
In Bayan Nur, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 28 July 1999, and the lowest was -40.2 °C on 10 December 1967.
These forecasts and records come from our own weather API. Developer documentation →