Huilong climate — normals and trends
Huilong (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.1 °C and it receives 1,310 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 August (27.3 °C on average) and the coldest is January (4.8 °C). Rainfall peaks in June.
Huilong averages 7 frost days, 14 hot days (≥ 30 °C) and 118 rainy days per year.
Huilong has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 11 to 3 per year over the period.
The hottest day of the period reached 34.5 °C (on 8 August 2013) and the coldest -7.8 °C (on 16 January 1958).
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
HuilongJiangsu
- coords
- 31.81°, 121.66°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.1°C
Average daily high
17.5°C
Average daily low
14.7°C
Annual rainfall
1,310mm
Sunshine / day
8.0h
Mean relative humidity
80%
Average peak wind
23.2km/h
Seasonal range
22.5°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
14 d/yr
Rainy days (≥ 1 mm)
118 d/yr
Annual snowfall
3.7 cm
Average feels-like high
17.4 °C
Average feels-like low
13.3 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
124 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.37 · 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
34.5 °C
8 August 2013
Coldest day
-7.8 °C
16 January 1958
Wettest day
212 mm
17 September 1983
Windiest day
84.9 km/h
21 August 1951
Strongest gust
130.7 km/h
21 August 1951
Hottest feels-like
43.5 °C
23 August 2022
Coldest feels-like
-17.6 °C
24 January 2016
Snowiest day
10.5 cm
17 February 1964
Sunniest day
14.0 h
19 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 | 8.1 °C | +1.8 °C | 17 mm | -32 mm |
| Feb | 6.8 °C | 0.0 °C | 22 mm | -43 mm |
| Mar | 12.3 °C | +2.2 °C | 82 mm | -16 mm |
| Apr | 18.0 °C | +2.8 °C | 52 mm | -63 mm |
| May | 21.6 °C | +1.5 °C | 170 mm | +34 mm |
| Jun | 25.6 °C | +1.6 °C | 262 mm | +26 mm |
| Jul | 29.7 °C | +1.4 °C | 211 mm | +39 mm |
| Aug | 31.2 °C | +2.6 °C | 82 mm | -51 mm |
| Sep | 29.2 °C | +3.8 °C | 123 mm | -16 mm |
| Oct | 23.6 °C | +3.0 °C | 59 mm | -7 mm |
| Nov | 16.1 °C | +0.7 °C | 8 mm | -52 mm |
| Dec | 11.4 °C | +2.0 °C | 4 mm | -38 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 Huilong?
Huilong has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.1 °C and it receives 1,310 mm of precipitation per year.
What is the hottest day ever recorded in Huilong?
The hottest day measured in Huilong between 1940 and 2025 was 8 August 2013, reaching 34.5 °C.
What is the coldest day in Huilong?
The coldest day measured in Huilong between 1940 and 2025 was 16 January 1958, at -7.8 °C.
Does it snow in Huilong?
Yes. Huilong gets on average 3.7 cm of snow per year and has around 7 frost days.
Has the climate of Huilong warmed?
Yes: Huilong warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Huilong?
The wettest day measured in Huilong between 1940 and 2025 was 17 September 1983, with 212 mm of rain in 24 hours.
What was the windiest day in Huilong?
The windiest day measured in Huilong between 1940 and 2025 was 21 August 1951, with winds reaching 84.9 km/h.
What is the warmest month in Huilong?
The warmest month in Huilong is August (27.3 °C on average); the coldest is January (4.8 °C).
How much does it rain in Huilong?
Huilong receives on average 1,310 mm of precipitation per year, spread over about 118 rainy days.
Is it sunny in Huilong?
Huilong gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Huilong?
The heaviest 24-hour snowfall measured in Huilong between 1940 and 2025 was 17 February 1964, with 10.5 cm.
Are there tropical nights in Huilong?
Yes: Huilong has on average 124 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Huilong?
In Huilong, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 23 August 2022, and the lowest was -17.6 °C on 24 January 2016.
Compare Huilong with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Huilong