Bikou climate — normals and trends
Bikou (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 12.2 °C and it receives 1,404 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 (22.2 °C on average) and the coldest is January (0.8 °C). Rainfall peaks in July.
Bikou averages 68 frost days, 4 hot days (≥ 30 °C) and 175 rainy days per year.
Bikou has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 76 to 60 per year over the period.
The hottest day of the period reached 33.7 °C (on 21 August 2022) and the coldest -20.2 °C (on 16 January 1955).
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
BikouGansu
- coords
- 32.75°, 105.24°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.2°C
Average daily high
15.9°C
Average daily low
8.6°C
Annual rainfall
1,404mm
Sunshine / day
7.0h
Mean relative humidity
78%
Average peak wind
7.9km/h
Seasonal range
21.4°C
Frost days (< 0 °C)
68 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
175 d/yr
Annual snowfall
32.6 cm
Average feels-like high
15.5 °C
Average feels-like low
7.7 °C
Average peak gust
32.7 km/h
Tropical nights (≥ 20 °C)
16 d/yr
Solar radiation
12.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.51 · 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
33.7 °C
21 August 2022
Coldest day
-20.2 °C
16 January 1955
Wettest day
263 mm
28 August 1946
Windiest day
25.6 km/h
10 April 1973
Strongest gust
115.9 km/h
12 April 1980
Hottest feels-like
39.2 °C
16 July 2025
Coldest feels-like
-25.1 °C
16 January 1955
Snowiest day
7.8 cm
25 January 1964
Sunniest day
14.0 h
10 June 1940
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 | 6.2 °C | +1.5 °C | 29 mm | +1 mm |
| Feb | 6.2 °C | -0.7 °C | 56 mm | +19 mm |
| Mar | 12.2 °C | +0.2 °C | 36 mm | -21 mm |
| Apr | 21.1 °C | +4.0 °C | 31 mm | -47 mm |
| May | 24.3 °C | +3.2 °C | 67 mm | -38 mm |
| Jun | 26.1 °C | +2.0 °C | 149 mm | -5 mm |
| Jul | 27.9 °C | +2.0 °C | 227 mm | -66 mm |
| Aug | 26.9 °C | +1.5 °C | 174 mm | -88 mm |
| Sep | 22.4 °C | +1.6 °C | 242 mm | +34 mm |
| Oct | 16.3 °C | +0.3 °C | 219 mm | +115 mm |
| Nov | 11.7 °C | +0.7 °C | 42 mm | -12 mm |
| Dec | 8.2 °C | +2.1 °C | 23 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 Bikou?
Bikou has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 12.2 °C and it receives 1,404 mm of precipitation per year.
What is the hottest day ever recorded in Bikou?
The hottest day measured in Bikou between 1940 and 2025 was 21 August 2022, reaching 33.7 °C.
What is the coldest day in Bikou?
The coldest day measured in Bikou between 1940 and 2025 was 16 January 1955, at -20.2 °C.
Does it snow in Bikou?
Yes. Bikou gets on average 32.6 cm of snow per year and has around 68 frost days.
Has the climate of Bikou warmed?
Yes: Bikou warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bikou?
The wettest day measured in Bikou between 1940 and 2025 was 28 August 1946, with 263 mm of rain in 24 hours.
What was the windiest day in Bikou?
The windiest day measured in Bikou between 1940 and 2025 was 10 April 1973, with winds reaching 25.6 km/h.
What is the warmest month in Bikou?
The warmest month in Bikou is July (22.2 °C on average); the coldest is January (0.8 °C).
How much does it rain in Bikou?
Bikou receives on average 1,404 mm of precipitation per year, spread over about 175 rainy days.
Is it sunny in Bikou?
Bikou 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 Bikou?
The heaviest 24-hour snowfall measured in Bikou between 1940 and 2025 was 25 January 1964, with 7.8 cm.
Are there tropical nights in Bikou?
Yes: Bikou has on average 16 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bikou?
In Bikou, between 1940 and 2025, the highest apparent temperature reached 39.2 °C on 16 July 2025, and the lowest was -25.1 °C on 16 January 1955.
Compare Bikou with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bikou