Aldan climate — normals and trends
Aldan (Russia) has a dry-winter subarctic climate (Dwc) under the Köppen-Geiger classification. Its mean annual temperature is -7.5 °C and it receives 716 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 (16.0 °C on average) and the coldest is January (-30.4 °C). Rainfall peaks in July.
Aldan averages 248 frost days, 1 hot days (≥ 30 °C) and 131 rainy days per year.
Aldan has warmed by +1.7 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.0 °C (on 12 July 2020) and the coldest -53.4 °C (on 9 January 1987).
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
AldanSakha
- coords
- 58.61°, 125.40°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
-7.5°C
Average daily high
-3.4°C
Average daily low
-11.8°C
Annual rainfall
716mm
Sunshine / day
8.0h
Mean relative humidity
74%
Average peak wind
13.2km/h
Seasonal range
46.4°C
Frost days (< 0 °C)
248 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
206.4 cm
Average feels-like high
-7.2 °C
Average feels-like low
-15.9 °C
Average peak gust
31.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.19 · 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
33.0 °C
12 July 2020
Coldest day
-53.4 °C
9 January 1987
Wettest day
73 mm
11 August 1988
Windiest day
35.6 km/h
29 May 2018
Strongest gust
88.9 km/h
29 May 2018
Hottest feels-like
33.9 °C
13 July 2020
Coldest feels-like
-58.0 °C
20 January 2023
Snowiest day
26.6 cm
15 September 2014
Sunniest day
17.4 h
28 June 1941
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 | -24.2 °C | +3.5 °C | 12 mm | -0 mm |
| Feb | -20.0 °C | +3.0 °C | 13 mm | +3 mm |
| Mar | -11.7 °C | +0.5 °C | 36 mm | +14 mm |
| Apr | 1.6 °C | +2.8 °C | 55 mm | +12 mm |
| May | 10.0 °C | +1.9 °C | 93 mm | +16 mm |
| Jun | 18.4 °C | +0.7 °C | 78 mm | -27 mm |
| Jul | 20.7 °C | -0.2 °C | 155 mm | +28 mm |
| Aug | 17.3 °C | -0.3 °C | 110 mm | -11 mm |
| Sep | 11.8 °C | +3.3 °C | 58 mm | -41 mm |
| Oct | -5.4 °C | -1.5 °C | 45 mm | -13 mm |
| Nov | -15.8 °C | +2.6 °C | 39 mm | +12 mm |
| Dec | -31.8 °C | -5.0 °C | 11 mm | -5 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 Aldan?
Aldan has a dry-winter subarctic climate (Köppen Dwc). Over 1940-2025, the average annual temperature is -7.5 °C and it receives 716 mm of precipitation per year.
What is the hottest day ever recorded in Aldan?
The hottest day measured in Aldan between 1940 and 2025 was 12 July 2020, reaching 33.0 °C.
What is the coldest day in Aldan?
The coldest day measured in Aldan between 1940 and 2025 was 9 January 1987, at -53.4 °C.
Does it snow in Aldan?
Yes. Aldan gets on average 206.4 cm of snow per year and has around 248 frost days.
Has the climate of Aldan warmed?
Yes: Aldan warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Aldan?
The wettest day measured in Aldan between 1940 and 2025 was 11 August 1988, with 73 mm of rain in 24 hours.
What was the windiest day in Aldan?
The windiest day measured in Aldan between 1940 and 2025 was 29 May 2018, with winds reaching 35.6 km/h.
What is the warmest month in Aldan?
The warmest month in Aldan is July (16.0 °C on average); the coldest is January (-30.4 °C).
How much does it rain in Aldan?
Aldan receives on average 716 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Aldan?
Aldan gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Aldan?
The heaviest 24-hour snowfall measured in Aldan between 1940 and 2025 was 15 September 2014, with 26.6 cm.
Are there tropical nights in Aldan?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Aldan.
What was the most extreme apparent temperature in Aldan?
In Aldan, between 1940 and 2025, the highest apparent temperature reached 33.9 °C on 13 July 2020, and the lowest was -58.0 °C on 20 January 2023.
Compare Aldan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Aldan