Bayan climate — normals and trends
Bayan (China) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 3.7 °C and it receives 696 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 (22.9 °C on average) and the coldest is January (-19.8 °C). Rainfall peaks in July.
Bayan averages 177 frost days, 11 hot days (≥ 30 °C) and 95 rainy days per year.
Bayan has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 182 to 172 per year over the period.
The hottest day of the period reached 37.9 °C (on 17 June 2008) and the coldest -39.6 °C (on 11 January 2001).
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
BayanHeilongjiang
- coords
- 46.08°, 127.39°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.7°C
Average daily high
8.8°C
Average daily low
-1.4°C
Annual rainfall
696mm
Sunshine / day
9.0h
Mean relative humidity
69%
Average peak wind
17.8km/h
Seasonal range
42.7°C
Frost days (< 0 °C)
177 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
43.7 cm
Average feels-like high
5.9 °C
Average feels-like low
-4.6 °C
Average peak gust
34.2 km/h
Tropical nights (≥ 20 °C)
17 d/yr
Solar radiation
14.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.42 · 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
37.9 °C
17 June 2008
Coldest day
-39.6 °C
11 January 2001
Wettest day
170 mm
13 July 1994
Windiest day
51.8 km/h
1 October 2017
Strongest gust
94.3 km/h
1 October 2017
Hottest feels-like
41.0 °C
3 August 1982
Coldest feels-like
-45.8 °C
11 January 2001
Snowiest day
21.4 cm
6 November 2023
Sunniest day
15.0 h
27 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 | -12.8 °C | +1.7 °C | 5 mm | -1 mm |
| Feb | -9.2 °C | 0.0 °C | 6 mm | -2 mm |
| Mar | 2.4 °C | +1.7 °C | 17 mm | -1 mm |
| Apr | 14.5 °C | +2.1 °C | 50 mm | +13 mm |
| May | 20.3 °C | +0.5 °C | 47 mm | -19 mm |
| Jun | 26.3 °C | +1.4 °C | 142 mm | +36 mm |
| Jul | 29.5 °C | +2.4 °C | 135 mm | -23 mm |
| Aug | 26.3 °C | +0.7 °C | 141 mm | -7 mm |
| Sep | 24.1 °C | +3.9 °C | 40 mm | -36 mm |
| Oct | 10.5 °C | -1.1 °C | 22 mm | -22 mm |
| Nov | 2.2 °C | +3.2 °C | 22 mm | +2 mm |
| Dec | -9.7 °C | +1.9 °C | 11 mm | +2 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 Bayan?
Bayan has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 3.7 °C and it receives 696 mm of precipitation per year.
What is the hottest day ever recorded in Bayan?
The hottest day measured in Bayan between 1940 and 2025 was 17 June 2008, reaching 37.9 °C.
What is the coldest day in Bayan?
The coldest day measured in Bayan between 1940 and 2025 was 11 January 2001, at -39.6 °C.
Does it snow in Bayan?
Yes. Bayan gets on average 43.7 cm of snow per year and has around 177 frost days.
Has the climate of Bayan warmed?
Yes: Bayan warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bayan?
The wettest day measured in Bayan between 1940 and 2025 was 13 July 1994, with 170 mm of rain in 24 hours.
What was the windiest day in Bayan?
The windiest day measured in Bayan between 1940 and 2025 was 1 October 2017, with winds reaching 51.8 km/h.
What is the warmest month in Bayan?
The warmest month in Bayan is July (22.9 °C on average); the coldest is January (-19.8 °C).
How much does it rain in Bayan?
Bayan receives on average 696 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Bayan?
Bayan gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bayan?
The heaviest 24-hour snowfall measured in Bayan between 1940 and 2025 was 6 November 2023, with 21.4 cm.
Are there tropical nights in Bayan?
Yes: Bayan has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bayan?
In Bayan, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 3 August 1982, and the lowest was -45.8 °C on 11 January 2001.
Compare Bayan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bayan