Gannan climate — normals and trends
Gannan (China) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 2.9 °C and it receives 569 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 (22.3 °C on average) and the coldest is January (-19.6 °C). Rainfall peaks in July.
Gannan averages 190 frost days, 15 hot days (≥ 30 °C) and 74 rainy days per year.
Gannan has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 194 to 186 per year over the period.
The hottest day of the period reached 41.9 °C (on 1 June 2018) and the coldest -42.3 °C (on 1 February 1979).
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
GannanHeilongjiang
- coords
- 47.92°, 123.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.9°C
Average daily high
8.7°C
Average daily low
-2.5°C
Annual rainfall
569mm
Sunshine / day
9.5h
Mean relative humidity
60%
Average peak wind
16.5km/h
Seasonal range
41.9°C
Frost days (< 0 °C)
190 d/yr
Hot days (≥ 30 °C)
15 d/yr
Rainy days (≥ 1 mm)
74 d/yr
Annual snowfall
33.3 cm
Average feels-like high
5.5 °C
Average feels-like low
-6.1 °C
Average peak gust
32.9 km/h
Tropical nights (≥ 20 °C)
7 d/yr
Solar radiation
14.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.34 · 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
41.9 °C
1 June 2018
Coldest day
-42.3 °C
1 February 1979
Wettest day
94 mm
4 August 1941
Windiest day
44.0 km/h
18 May 2009
Strongest gust
91.8 km/h
16 July 2013
Hottest feels-like
41.5 °C
22 July 1968
Coldest feels-like
-47.8 °C
1 February 1979
Snowiest day
25.1 cm
15 April 1966
Sunniest day
15.2 h
1 July 1960
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 | +0.9 °C | 5 mm | +2 mm |
| Feb | -8.6 °C | -0.2 °C | 5 mm | +1 mm |
| Mar | 1.8 °C | +0.5 °C | 19 mm | +9 mm |
| Apr | 12.2 °C | +0.3 °C | 61 mm | +32 mm |
| May | 21.6 °C | +1.6 °C | 15 mm | -29 mm |
| Jun | 27.3 °C | +1.8 °C | 67 mm | -21 mm |
| Jul | 30.2 °C | +3.1 °C | 142 mm | -19 mm |
| Aug | 25.4 °C | +0.2 °C | 184 mm | +61 mm |
| Sep | 22.5 °C | +3.3 °C | 54 mm | -12 mm |
| Oct | 8.8 °C | -1.3 °C | 8 mm | -20 mm |
| Nov | 0.5 °C | +3.0 °C | 7 mm | -1 mm |
| Dec | -11.2 °C | +0.7 °C | 7 mm | +3 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 Gannan?
Gannan has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 2.9 °C and it receives 569 mm of precipitation per year.
What is the hottest day ever recorded in Gannan?
The hottest day measured in Gannan between 1940 and 2025 was 1 June 2018, reaching 41.9 °C.
What is the coldest day in Gannan?
The coldest day measured in Gannan between 1940 and 2025 was 1 February 1979, at -42.3 °C.
Does it snow in Gannan?
Yes. Gannan gets on average 33.3 cm of snow per year and has around 190 frost days.
Has the climate of Gannan warmed?
Yes: Gannan warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gannan?
The wettest day measured in Gannan between 1940 and 2025 was 4 August 1941, with 94 mm of rain in 24 hours.
What was the windiest day in Gannan?
The windiest day measured in Gannan between 1940 and 2025 was 18 May 2009, with winds reaching 44.0 km/h.
What is the warmest month in Gannan?
The warmest month in Gannan is July (22.3 °C on average); the coldest is January (-19.6 °C).
How much does it rain in Gannan?
Gannan receives on average 569 mm of precipitation per year, spread over about 74 rainy days.
Is it sunny in Gannan?
Gannan gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
What is the biggest single-day snowfall in Gannan?
The heaviest 24-hour snowfall measured in Gannan between 1940 and 2025 was 15 April 1966, with 25.1 cm.
Are there tropical nights in Gannan?
Yes: Gannan has on average 7 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gannan?
In Gannan, between 1940 and 2025, the highest apparent temperature reached 41.5 °C on 22 July 1968, and the lowest was -47.8 °C on 1 February 1979.
Compare Gannan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gannan