Guankou climate — normals and trends
Guankou (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.5 °C and it receives 2,009 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 (28.4 °C on average) and the coldest is January (5.7 °C). Rainfall peaks in June.
Guankou averages 21 frost days, 80 hot days (≥ 30 °C) and 161 rainy days per year.
Guankou has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The number of frost days there went from about 26 to 16 per year over the period.
The hottest day of the period reached 40.9 °C (on 16 August 1953) and the coldest -12.7 °C (on 16 January 1970).
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
GuankouHunan
- coords
- 28.16°, 113.63°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.5°C
Average daily high
21.5°C
Average daily low
13.9°C
Annual rainfall
2,009mm
Sunshine / day
7.0h
Mean relative humidity
78%
Average peak wind
10.2km/h
Seasonal range
22.7°C
Frost days (< 0 °C)
21 d/yr
Hot days (≥ 30 °C)
80 d/yr
Rainy days (≥ 1 mm)
161 d/yr
Annual snowfall
10.0 cm
Average feels-like high
22.7 °C
Average feels-like low
14.3 °C
Average peak gust
27.7 km/h
Tropical nights (≥ 20 °C)
117 d/yr
Solar radiation
13.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.15 · 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
40.9 °C
16 August 1953
Coldest day
-12.7 °C
16 January 1970
Wettest day
199 mm
3 July 2016
Windiest day
33.0 km/h
9 June 1946
Strongest gust
94.7 km/h
5 April 1964
Hottest feels-like
45.6 °C
10 July 1988
Coldest feels-like
-17.7 °C
16 January 1970
Snowiest day
13.1 cm
1 February 2008
Sunniest day
13.1 h
22 June 1944
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 | 14.2 °C | +4.9 °C | 44 mm | -29 mm |
| Feb | 10.2 °C | -0.8 °C | 75 mm | -42 mm |
| Mar | 17.3 °C | +1.7 °C | 152 mm | -60 mm |
| Apr | 24.2 °C | +2.9 °C | 315 mm | -9 mm |
| May | 27.2 °C | +1.5 °C | 331 mm | -15 mm |
| Jun | 29.5 °C | +0.6 °C | 197 mm | -150 mm |
| Jul | 34.4 °C | +2.1 °C | 70 mm | -88 mm |
| Aug | 35.8 °C | +3.7 °C | 34 mm | -92 mm |
| Sep | 31.8 °C | +3.1 °C | 88 mm | +2 mm |
| Oct | 25.9 °C | +2.7 °C | 14 mm | -73 mm |
| Nov | 19.0 °C | +1.5 °C | 84 mm | +5 mm |
| Dec | 15.8 °C | +4.0 °C | 34 mm | -22 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 Guankou?
Guankou has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.5 °C and it receives 2,009 mm of precipitation per year.
What is the hottest day ever recorded in Guankou?
The hottest day measured in Guankou between 1940 and 2025 was 16 August 1953, reaching 40.9 °C.
What is the coldest day in Guankou?
The coldest day measured in Guankou between 1940 and 2025 was 16 January 1970, at -12.7 °C.
Does it snow in Guankou?
Yes. Guankou gets on average 10.0 cm of snow per year and has around 21 frost days.
Has the climate of Guankou warmed?
Yes: Guankou warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guankou?
The wettest day measured in Guankou between 1940 and 2025 was 3 July 2016, with 199 mm of rain in 24 hours.
What was the windiest day in Guankou?
The windiest day measured in Guankou between 1940 and 2025 was 9 June 1946, with winds reaching 33.0 km/h.
What is the warmest month in Guankou?
The warmest month in Guankou is July (28.4 °C on average); the coldest is January (5.7 °C).
How much does it rain in Guankou?
Guankou receives on average 2,009 mm of precipitation per year, spread over about 161 rainy days.
Is it sunny in Guankou?
Guankou gets on average 7.0 hours of sunshine per day, roughly 2,555 hours per year over 1940-2025.
What is the biggest single-day snowfall in Guankou?
The heaviest 24-hour snowfall measured in Guankou between 1940 and 2025 was 1 February 2008, with 13.1 cm.
Are there tropical nights in Guankou?
Yes: Guankou has on average 117 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Guankou?
In Guankou, between 1940 and 2025, the highest apparent temperature reached 45.6 °C on 10 July 1988, and the lowest was -17.7 °C on 16 January 1970.
Compare Guankou with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Guankou