Bayanhongor climate — normals and trends
Bayanhongor (Mongolia) has a dry-winter subarctic climate (Dwc) under the Köppen-Geiger classification. Its mean annual temperature is -1.8 °C and it receives 264 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 (15.2 °C on average) and the coldest is January (-20.4 °C). Rainfall peaks in July.
Bayanhongor averages 237 frost days, 0 hot days (≥ 30 °C) and 53 rainy days per year.
Bayanhongor has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 249 to 225 per year over the period.
The hottest day of the period reached 31.6 °C (on 16 July 1952) and the coldest -43.3 °C (on 24 January 1981).
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
BayanhongorBayankhongor
- coords
- 46.19°, 100.72°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
-1.8°C
Average daily high
4.8°C
Average daily low
-8.2°C
Annual rainfall
264mm
Sunshine / day
10.5h
Mean relative humidity
53%
Average peak wind
15.1km/h
Seasonal range
35.6°C
Frost days (< 0 °C)
237 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
53 d/yr
Annual snowfall
39.8 cm
Average feels-like high
0.7 °C
Average feels-like low
-12.3 °C
Average peak gust
32.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.39 · 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
31.6 °C
16 July 1952
Coldest day
-43.3 °C
24 January 1981
Wettest day
55 mm
22 July 1955
Windiest day
48.1 km/h
29 April 1995
Strongest gust
99.7 km/h
29 April 1995
Hottest feels-like
31.4 °C
22 July 1999
Coldest feels-like
-48.9 °C
17 February 1952
Snowiest day
17.6 cm
5 October 1973
Sunniest day
15.0 h
4 July 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 | -9.3 °C | +3.3 °C | 0 mm | -2 mm |
| Feb | -7.6 °C | +1.8 °C | 0 mm | -3 mm |
| Mar | -0.3 °C | +1.4 °C | 8 mm | 0 mm |
| Apr | 10.5 °C | +3.8 °C | 12 mm | -4 mm |
| May | 13.8 °C | 0.0 °C | 49 mm | +23 mm |
| Jun | 20.5 °C | +1.2 °C | 47 mm | +4 mm |
| Jul | 22.5 °C | +1.7 °C | 94 mm | +25 mm |
| Aug | 20.0 °C | +1.0 °C | 29 mm | -27 mm |
| Sep | 14.3 °C | +1.0 °C | 17 mm | -8 mm |
| Oct | 1.6 °C | -3.3 °C | 10 mm | -0 mm |
| Nov | -5.5 °C | -0.6 °C | 7 mm | +2 mm |
| Dec | -9.8 °C | +1.3 °C | 3 mm | +1 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 Bayanhongor?
Bayanhongor has a dry-winter subarctic climate (Köppen Dwc). Over 1940-2025, the average annual temperature is -1.8 °C and it receives 264 mm of precipitation per year.
What is the hottest day ever recorded in Bayanhongor?
The hottest day measured in Bayanhongor between 1940 and 2025 was 16 July 1952, reaching 31.6 °C.
What is the coldest day in Bayanhongor?
The coldest day measured in Bayanhongor between 1940 and 2025 was 24 January 1981, at -43.3 °C.
Does it snow in Bayanhongor?
Yes. Bayanhongor gets on average 39.8 cm of snow per year and has around 237 frost days.
Has the climate of Bayanhongor warmed?
Yes: Bayanhongor warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bayanhongor?
The wettest day measured in Bayanhongor between 1940 and 2025 was 22 July 1955, with 55 mm of rain in 24 hours.
What was the windiest day in Bayanhongor?
The windiest day measured in Bayanhongor between 1940 and 2025 was 29 April 1995, with winds reaching 48.1 km/h.
What is the warmest month in Bayanhongor?
The warmest month in Bayanhongor is July (15.2 °C on average); the coldest is January (-20.4 °C).
How much does it rain in Bayanhongor?
Bayanhongor receives on average 264 mm of precipitation per year, spread over about 53 rainy days.
Is it sunny in Bayanhongor?
Bayanhongor gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bayanhongor?
The heaviest 24-hour snowfall measured in Bayanhongor between 1940 and 2025 was 5 October 1973, with 17.6 cm.
Are there tropical nights in Bayanhongor?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bayanhongor.
What was the most extreme apparent temperature in Bayanhongor?
In Bayanhongor, between 1940 and 2025, the highest apparent temperature reached 31.4 °C on 22 July 1999, and the lowest was -48.9 °C on 17 February 1952.
Compare Bayanhongor with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bayanhongor