Altay climate — normals and trends
Altay (China) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 2.2 °C and it receives 254 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 (19.8 °C on average) and the coldest is January (-16.7 °C). Rainfall peaks in November.
Altay averages 195 frost days, 6 hot days (≥ 30 °C) and 59 rainy days per year.
Altay has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The number of frost days there went from about 204 to 186 per year over the period.
The hottest day of the period reached 37.3 °C (on 14 July 2004) and the coldest -40.9 °C (on 11 December 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
AltayXinjiang
- coords
- 47.85°, 88.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.2°C
Average daily high
7.8°C
Average daily low
-3.3°C
Annual rainfall
254mm
Sunshine / day
10.2h
Mean relative humidity
57%
Average peak wind
13.4km/h
Seasonal range
36.5°C
Frost days (< 0 °C)
195 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
59 d/yr
Annual snowfall
82.0 cm
Average feels-like high
4.5 °C
Average feels-like low
-7.4 °C
Average peak gust
28.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
15.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.06 · p = 0.024
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
37.3 °C
14 July 2004
Coldest day
-40.9 °C
11 December 2001
Wettest day
30 mm
7 November 1994
Windiest day
37.2 km/h
23 April 1982
Strongest gust
79.2 km/h
8 May 2014
Hottest feels-like
36.9 °C
22 July 2015
Coldest feels-like
-46.2 °C
11 December 2001
Snowiest day
15.1 cm
2 November 2021
Sunniest day
15.4 h
14 June 2023
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 | -10.3 °C | +1.2 °C | 18 mm | +4 mm |
| Feb | -8.6 °C | -0.4 °C | 0 mm | -13 mm |
| Mar | -0.8 °C | -0.3 °C | 35 mm | +18 mm |
| Apr | 13.1 °C | +2.9 °C | 23 mm | +0 mm |
| May | 20.3 °C | +2.4 °C | 16 mm | -7 mm |
| Jun | 26.3 °C | +2.9 °C | 12 mm | -8 mm |
| Jul | 27.5 °C | +2.3 °C | 4 mm | -18 mm |
| Aug | 23.1 °C | -0.6 °C | 17 mm | -0 mm |
| Sep | 16.4 °C | -1.2 °C | 64 mm | +42 mm |
| Oct | 6.7 °C | -2.0 °C | 23 mm | -5 mm |
| Nov | -2.5 °C | +0.3 °C | 30 mm | -4 mm |
| Dec | -9.5 °C | +1.0 °C | 35 mm | +14 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 Altay?
Altay has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 2.2 °C and it receives 254 mm of precipitation per year.
What is the hottest day ever recorded in Altay?
The hottest day measured in Altay between 1940 and 2025 was 14 July 2004, reaching 37.3 °C.
What is the coldest day in Altay?
The coldest day measured in Altay between 1940 and 2025 was 11 December 2001, at -40.9 °C.
Does it snow in Altay?
Yes. Altay gets on average 82.0 cm of snow per year and has around 195 frost days.
Has the climate of Altay warmed?
Yes: Altay warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Altay?
The wettest day measured in Altay between 1940 and 2025 was 7 November 1994, with 30 mm of rain in 24 hours.
What was the windiest day in Altay?
The windiest day measured in Altay between 1940 and 2025 was 23 April 1982, with winds reaching 37.2 km/h.
What is the warmest month in Altay?
The warmest month in Altay is July (19.8 °C on average); the coldest is January (-16.7 °C).
How much does it rain in Altay?
Altay receives on average 254 mm of precipitation per year, spread over about 59 rainy days.
Is it sunny in Altay?
Altay gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
What is the biggest single-day snowfall in Altay?
The heaviest 24-hour snowfall measured in Altay between 1940 and 2025 was 2 November 2021, with 15.1 cm.
Are there tropical nights in Altay?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Altay.
What was the most extreme apparent temperature in Altay?
In Altay, between 1940 and 2025, the highest apparent temperature reached 36.9 °C on 22 July 2015, and the lowest was -46.2 °C on 11 December 2001.
Compare Altay with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Altay