Chonglong climate — normals and trends
Chonglong (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 17.6 °C and it receives 1,226 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 (26.7 °C on average) and the coldest is January (7.3 °C). Rainfall peaks in July.
Chonglong averages 2 frost days, 54 hot days (≥ 30 °C) and 159 rainy days per year.
Chonglong has warmed by +1.2 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 4 to 0 per year over the period.
The hottest day of the period reached 43.1 °C (on 21 August 2022) and the coldest -7.0 °C (on 14 December 1975).
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
ChonglongSichuan
- coords
- 29.78°, 104.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.6°C
Average daily high
21.0°C
Average daily low
14.6°C
Annual rainfall
1,226mm
Sunshine / day
6.6h
Mean relative humidity
78%
Average peak wind
11.3km/h
Seasonal range
19.4°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
54 d/yr
Rainy days (≥ 1 mm)
159 d/yr
Annual snowfall
1.9 cm
Average feels-like high
21.9 °C
Average feels-like low
14.9 °C
Average peak gust
23.3 km/h
Tropical nights (≥ 20 °C)
108 d/yr
Solar radiation
12.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.2 °C per decade · r² = 0.33 · 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
43.1 °C
21 August 2022
Coldest day
-7.0 °C
14 December 1975
Wettest day
127 mm
29 July 2019
Windiest day
66.3 km/h
13 May 1946
Strongest gust
79.9 km/h
13 April 1980
Hottest feels-like
47.0 °C
15 July 2022
Coldest feels-like
-11.7 °C
14 December 1975
Snowiest day
4.7 cm
5 January 1970
Sunniest day
13.9 h
25 June 2020
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 | 11.8 °C | +1.6 °C | 33 mm | +13 mm |
| Feb | 11.5 °C | -0.8 °C | 63 mm | +37 mm |
| Mar | 16.8 °C | -0.5 °C | 47 mm | +2 mm |
| Apr | 25.9 °C | +3.3 °C | 67 mm | -10 mm |
| May | 28.4 °C | +2.2 °C | 79 mm | -27 mm |
| Jun | 32.1 °C | +3.9 °C | 216 mm | +55 mm |
| Jul | 33.6 °C | +3.2 °C | 223 mm | -41 mm |
| Aug | 32.8 °C | +2.4 °C | 294 mm | +52 mm |
| Sep | 27.2 °C | +1.3 °C | 319 mm | +170 mm |
| Oct | 22.0 °C | +1.2 °C | 110 mm | +37 mm |
| Nov | 16.3 °C | 0.0 °C | 24 mm | -17 mm |
| Dec | 13.2 °C | +1.9 °C | 11 mm | -11 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 Chonglong?
Chonglong has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 17.6 °C and it receives 1,226 mm of precipitation per year.
What is the hottest day ever recorded in Chonglong?
The hottest day measured in Chonglong between 1940 and 2025 was 21 August 2022, reaching 43.1 °C.
What is the coldest day in Chonglong?
The coldest day measured in Chonglong between 1940 and 2025 was 14 December 1975, at -7.0 °C.
Does it snow in Chonglong?
Yes. Chonglong gets on average 1.9 cm of snow per year and has around 2 frost days.
Has the climate of Chonglong warmed?
Yes: Chonglong warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chonglong?
The wettest day measured in Chonglong between 1940 and 2025 was 29 July 2019, with 127 mm of rain in 24 hours.
What was the windiest day in Chonglong?
The windiest day measured in Chonglong between 1940 and 2025 was 13 May 1946, with winds reaching 66.3 km/h.
What is the warmest month in Chonglong?
The warmest month in Chonglong is July (26.7 °C on average); the coldest is January (7.3 °C).
How much does it rain in Chonglong?
Chonglong receives on average 1,226 mm of precipitation per year, spread over about 159 rainy days.
Is it sunny in Chonglong?
Chonglong gets on average 6.6 hours of sunshine per day, roughly 2,409 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chonglong?
The heaviest 24-hour snowfall measured in Chonglong between 1940 and 2025 was 5 January 1970, with 4.7 cm.
Are there tropical nights in Chonglong?
Yes: Chonglong has on average 108 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chonglong?
In Chonglong, between 1940 and 2025, the highest apparent temperature reached 47.0 °C on 15 July 2022, and the lowest was -11.7 °C on 14 December 1975.
Compare Chonglong with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chonglong