Ahu climate — normals and trends
Ahu (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 14.3 °C and it receives 982 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 (26.9 °C on average) and the coldest is January (0.0 °C). Rainfall peaks in July.
Ahu averages 80 frost days, 55 hot days (≥ 30 °C) and 91 rainy days per year.
Ahu has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 93 to 67 per year over the period.
The hottest day of the period reached 41.0 °C (on 11 August 1946) and the coldest -23.4 °C (on 11 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
AhuJiangsu
- coords
- 34.38°, 118.60°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.3°C
Average daily high
18.9°C
Average daily low
10.0°C
Annual rainfall
982mm
Sunshine / day
8.5h
Mean relative humidity
71%
Average peak wind
14.9km/h
Seasonal range
26.9°C
Frost days (< 0 °C)
80 d/yr
Hot days (≥ 30 °C)
55 d/yr
Rainy days (≥ 1 mm)
91 d/yr
Annual snowfall
13.0 cm
Average feels-like high
18.5 °C
Average feels-like low
8.9 °C
Average peak gust
30.8 km/h
Tropical nights (≥ 20 °C)
81 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.30 · 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
41.0 °C
11 August 1946
Coldest day
-23.4 °C
11 January 1955
Wettest day
169 mm
18 July 1951
Windiest day
42.4 km/h
5 September 1956
Strongest gust
88.9 km/h
24 June 1979
Hottest feels-like
45.8 °C
12 August 1946
Coldest feels-like
-29.0 °C
11 January 1955
Snowiest day
18.8 cm
7 February 1964
Sunniest day
14.0 h
26 May 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 | 8.5 °C | +3.8 °C | 3 mm | -15 mm |
| Feb | 8.9 °C | +1.8 °C | 5 mm | -21 mm |
| Mar | 16.5 °C | +3.6 °C | 43 mm | +4 mm |
| Apr | 24.2 °C | +4.5 °C | 20 mm | -35 mm |
| May | 27.1 °C | +1.9 °C | 29 mm | -45 mm |
| Jun | 31.0 °C | +1.7 °C | 138 mm | +22 mm |
| Jul | 34.1 °C | +3.7 °C | 39 mm | -236 mm |
| Aug | 32.1 °C | +2.0 °C | 235 mm | +59 mm |
| Sep | 26.3 °C | +0.3 °C | 323 mm | +216 mm |
| Oct | 20.0 °C | -0.9 °C | 141 mm | +95 mm |
| Nov | 16.6 °C | +2.7 °C | 12 mm | -20 mm |
| Dec | 9.6 °C | +2.6 °C | 14 mm | -4 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 Ahu?
Ahu has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 14.3 °C and it receives 982 mm of precipitation per year.
What is the hottest day ever recorded in Ahu?
The hottest day measured in Ahu between 1940 and 2025 was 11 August 1946, reaching 41.0 °C.
What is the coldest day in Ahu?
The coldest day measured in Ahu between 1940 and 2025 was 11 January 1955, at -23.4 °C.
Does it snow in Ahu?
Yes. Ahu gets on average 13.0 cm of snow per year and has around 80 frost days.
Has the climate of Ahu warmed?
Yes: Ahu warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ahu?
The wettest day measured in Ahu between 1940 and 2025 was 18 July 1951, with 169 mm of rain in 24 hours.
What was the windiest day in Ahu?
The windiest day measured in Ahu between 1940 and 2025 was 5 September 1956, with winds reaching 42.4 km/h.
What is the warmest month in Ahu?
The warmest month in Ahu is July (26.9 °C on average); the coldest is January (0.0 °C).
How much does it rain in Ahu?
Ahu receives on average 982 mm of precipitation per year, spread over about 91 rainy days.
Is it sunny in Ahu?
Ahu gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ahu?
The heaviest 24-hour snowfall measured in Ahu between 1940 and 2025 was 7 February 1964, with 18.8 cm.
Are there tropical nights in Ahu?
Yes: Ahu has on average 81 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ahu?
In Ahu, between 1940 and 2025, the highest apparent temperature reached 45.8 °C on 12 August 1946, and the lowest was -29.0 °C on 11 January 1955.
Compare Ahu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ahu