Longjiang climate — normals and trends
Longjiang (China) has a hot-summer humid continental, dry winter climate (Dwa) under the Köppen-Geiger classification. Its mean annual temperature is 4.0 °C and it receives 512 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 (23.0 °C on average) and the coldest is January (-18.4 °C). Rainfall peaks in July.
Longjiang averages 183 frost days, 21 hot days (≥ 30 °C) and 68 rainy days per year.
Longjiang has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 188 to 178 per year over the period.
The hottest day of the period reached 41.5 °C (on 22 July 1968) and the coldest -37.5 °C (on 10 January 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
LongjiangHeilongjiang
- coords
- 47.34°, 123.20°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.0°C
Average daily high
9.6°C
Average daily low
-1.4°C
Annual rainfall
512mm
Sunshine / day
9.6h
Mean relative humidity
58%
Average peak wind
17.7km/h
Seasonal range
41.4°C
Frost days (< 0 °C)
183 d/yr
Hot days (≥ 30 °C)
21 d/yr
Rainy days (≥ 1 mm)
68 d/yr
Annual snowfall
27.1 cm
Average feels-like high
6.4 °C
Average feels-like low
-5.0 °C
Average peak gust
33.8 km/h
Tropical nights (≥ 20 °C)
12 d/yr
Solar radiation
14.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.31 · 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
41.5 °C
22 July 1968
Coldest day
-37.5 °C
10 January 2001
Wettest day
98 mm
15 August 1975
Windiest day
54.0 km/h
5 April 1984
Strongest gust
95.4 km/h
16 July 2013
Hottest feels-like
43.1 °C
22 July 1968
Coldest feels-like
-43.1 °C
16 January 1980
Snowiest day
25.4 cm
15 April 1966
Sunniest day
15.1 h
28 June 1961
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 | -12.3 °C | +0.5 °C | 6 mm | +4 mm |
| Feb | -9.6 °C | -2.1 °C | 3 mm | -1 mm |
| Mar | 3.2 °C | +1.0 °C | 14 mm | +5 mm |
| Apr | 13.6 °C | +0.6 °C | 57 mm | +31 mm |
| May | 22.1 °C | +1.1 °C | 25 mm | -15 mm |
| Jun | 27.2 °C | +1.0 °C | 98 mm | +14 mm |
| Jul | 30.1 °C | +2.3 °C | 142 mm | -4 mm |
| Aug | 26.3 °C | +0.3 °C | 168 mm | +59 mm |
| Sep | 23.4 °C | +3.1 °C | 64 mm | +6 mm |
| Oct | 10.0 °C | -1.3 °C | 8 mm | -17 mm |
| Nov | 1.9 °C | +3.3 °C | 3 mm | -4 mm |
| Dec | -9.1 °C | +1.7 °C | 4 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 Longjiang?
Longjiang has a hot-summer humid continental, dry winter climate (Köppen Dwa). Over 1940-2025, the average annual temperature is 4.0 °C and it receives 512 mm of precipitation per year.
What is the hottest day ever recorded in Longjiang?
The hottest day measured in Longjiang between 1940 and 2025 was 22 July 1968, reaching 41.5 °C.
What is the coldest day in Longjiang?
The coldest day measured in Longjiang between 1940 and 2025 was 10 January 2001, at -37.5 °C.
Does it snow in Longjiang?
Yes. Longjiang gets on average 27.1 cm of snow per year and has around 183 frost days.
Has the climate of Longjiang warmed?
Yes: Longjiang warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Longjiang?
The wettest day measured in Longjiang between 1940 and 2025 was 15 August 1975, with 98 mm of rain in 24 hours.
What was the windiest day in Longjiang?
The windiest day measured in Longjiang between 1940 and 2025 was 5 April 1984, with winds reaching 54.0 km/h.
What is the warmest month in Longjiang?
The warmest month in Longjiang is July (23.0 °C on average); the coldest is January (-18.4 °C).
How much does it rain in Longjiang?
Longjiang receives on average 512 mm of precipitation per year, spread over about 68 rainy days.
Is it sunny in Longjiang?
Longjiang gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
What is the biggest single-day snowfall in Longjiang?
The heaviest 24-hour snowfall measured in Longjiang between 1940 and 2025 was 15 April 1966, with 25.4 cm.
Are there tropical nights in Longjiang?
Yes: Longjiang has on average 12 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Longjiang?
In Longjiang, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 22 July 1968, and the lowest was -43.1 °C on 16 January 1980.
Compare Longjiang with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Longjiang