Altai climate — normals and trends
Altai (Mongolia) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 0.2 °C and it receives 243 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 (16.3 °C on average) and the coldest is January (-16.7 °C). Rainfall peaks in July.
Altai averages 216 frost days, 0 hot days (≥ 30 °C) and 55 rainy days per year.
Altai has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 220 to 212 per year over the period.
The hottest day of the period reached 32.0 °C (on 12 July 2000) and the coldest -37.1 °C (on 6 February 1957).
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
AltaiGovi-Altai Province
- coords
- 46.37°, 96.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
0.2°C
Average daily high
5.2°C
Average daily low
-4.7°C
Annual rainfall
243mm
Sunshine / day
10.6h
Mean relative humidity
49%
Average peak wind
15.3km/h
Seasonal range
33.0°C
Frost days (< 0 °C)
216 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
55 d/yr
Annual snowfall
43.7 cm
Average feels-like high
1.0 °C
Average feels-like low
-8.8 °C
Average peak gust
34.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.16 · 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
32.0 °C
12 July 2000
Coldest day
-37.1 °C
6 February 1957
Wettest day
51 mm
10 August 1987
Windiest day
48.2 km/h
15 April 1988
Strongest gust
102.6 km/h
15 April 1988
Hottest feels-like
30.4 °C
13 July 2004
Coldest feels-like
-42.2 °C
6 February 1957
Snowiest day
13.0 cm
1 June 1961
Sunniest day
15.0 h
23 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -9.2 °C | +2.8 °C | 3 mm | +2 mm |
| Feb | -8.5 °C | +0.3 °C | 1 mm | -2 mm |
| Mar | -1.1 °C | +0.2 °C | 8 mm | -1 mm |
| Apr | 10.2 °C | +3.3 °C | 22 mm | +4 mm |
| May | 13.6 °C | -0.4 °C | 57 mm | +34 mm |
| Jun | 20.9 °C | +1.4 °C | 64 mm | +21 mm |
| Jul | 24.2 °C | +3.0 °C | 26 mm | -30 mm |
| Aug | 20.6 °C | +1.2 °C | 18 mm | -29 mm |
| Sep | 13.6 °C | +0.1 °C | 29 mm | +5 mm |
| Oct | 2.9 °C | -2.4 °C | 7 mm | -4 mm |
| Nov | -3.2 °C | +1.3 °C | 8 mm | +2 mm |
| Dec | -7.1 °C | +3.3 °C | 3 mm | +0 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 Altai?
Altai has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 0.2 °C and it receives 243 mm of precipitation per year.
What is the hottest day ever recorded in Altai?
The hottest day measured in Altai between 1940 and 2025 was 12 July 2000, reaching 32.0 °C.
What is the coldest day in Altai?
The coldest day measured in Altai between 1940 and 2025 was 6 February 1957, at -37.1 °C.
Does it snow in Altai?
Yes. Altai gets on average 43.7 cm of snow per year and has around 216 frost days.
Has the climate of Altai warmed?
Yes: Altai warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Altai?
The wettest day measured in Altai between 1940 and 2025 was 10 August 1987, with 51 mm of rain in 24 hours.
What was the windiest day in Altai?
The windiest day measured in Altai between 1940 and 2025 was 15 April 1988, with winds reaching 48.2 km/h.
What is the warmest month in Altai?
The warmest month in Altai is July (16.3 °C on average); the coldest is January (-16.7 °C).
How much does it rain in Altai?
Altai receives on average 243 mm of precipitation per year, spread over about 55 rainy days.
Is it sunny in Altai?
Altai gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
What is the biggest single-day snowfall in Altai?
The heaviest 24-hour snowfall measured in Altai between 1940 and 2025 was 1 June 1961, with 13.0 cm.
Are there tropical nights in Altai?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Altai.
What was the most extreme apparent temperature in Altai?
In Altai, between 1940 and 2025, the highest apparent temperature reached 30.4 °C on 13 July 2004, and the lowest was -42.2 °C on 6 February 1957.
Compare Altai with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Altai