Changlong climate — normals and trends
Changlong (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.9 °C and it receives 1,452 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 (27.9 °C on average) and the coldest is January (7.4 °C). Rainfall peaks in July.
Changlong averages 2 frost days, 71 hot days (≥ 30 °C) and 166 rainy days per year.
Changlong has warmed by +0.9 °C between 1940 and 2025, or +0.11 °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 41.6 °C (on 18 August 2022) and the coldest -6.9 °C (on 12 February 1945).
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
ChanglongChongqing Municipality
- coords
- 30.31°, 107.41°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.9°C
Average daily high
21.3°C
Average daily low
14.8°C
Annual rainfall
1,452mm
Sunshine / day
6.1h
Mean relative humidity
78%
Average peak wind
8.8km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
71 d/yr
Rainy days (≥ 1 mm)
166 d/yr
Annual snowfall
2.2 cm
Average feels-like high
22.6 °C
Average feels-like low
15.5 °C
Average peak gust
21.1 km/h
Tropical nights (≥ 20 °C)
112 d/yr
Solar radiation
11.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.27 · 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
41.6 °C
18 August 2022
Coldest day
-6.9 °C
12 February 1945
Wettest day
166 mm
5 July 1950
Windiest day
46.8 km/h
23 May 1946
Strongest gust
68.8 km/h
31 March 1947
Hottest feels-like
46.9 °C
5 August 1994
Coldest feels-like
-10.9 °C
12 February 1945
Snowiest day
5.8 cm
29 January 1977
Sunniest day
13.9 h
29 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 | 11.8 °C | +1.8 °C | 59 mm | +19 mm |
| Feb | 11.7 °C | -0.3 °C | 34 mm | -15 mm |
| Mar | 17.1 °C | +0.2 °C | 132 mm | +30 mm |
| Apr | 25.0 °C | +2.9 °C | 140 mm | -7 mm |
| May | 28.2 °C | +2.6 °C | 88 mm | -93 mm |
| Jun | 29.1 °C | +0.8 °C | 200 mm | +23 mm |
| Jul | 34.7 °C | +3.0 °C | 131 mm | -52 mm |
| Aug | 34.5 °C | +2.3 °C | 152 mm | +4 mm |
| Sep | 29.6 °C | +2.1 °C | 163 mm | +13 mm |
| Oct | 24.0 °C | +2.5 °C | 163 mm | +29 mm |
| Nov | 17.0 °C | +0.5 °C | 72 mm | -18 mm |
| Dec | 13.5 °C | +2.1 °C | 53 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 Changlong?
Changlong has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.9 °C and it receives 1,452 mm of precipitation per year.
What is the hottest day ever recorded in Changlong?
The hottest day measured in Changlong between 1940 and 2025 was 18 August 2022, reaching 41.6 °C.
What is the coldest day in Changlong?
The coldest day measured in Changlong between 1940 and 2025 was 12 February 1945, at -6.9 °C.
Does it snow in Changlong?
Yes. Changlong gets on average 2.2 cm of snow per year and has around 2 frost days.
Has the climate of Changlong warmed?
Yes: Changlong warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Changlong?
The wettest day measured in Changlong between 1940 and 2025 was 5 July 1950, with 166 mm of rain in 24 hours.
What was the windiest day in Changlong?
The windiest day measured in Changlong between 1940 and 2025 was 23 May 1946, with winds reaching 46.8 km/h.
What is the warmest month in Changlong?
The warmest month in Changlong is August (27.9 °C on average); the coldest is January (7.4 °C).
How much does it rain in Changlong?
Changlong receives on average 1,452 mm of precipitation per year, spread over about 166 rainy days.
Is it sunny in Changlong?
Changlong gets on average 6.1 hours of sunshine per day, roughly 2,227 hours per year over 1940-2025.
What is the biggest single-day snowfall in Changlong?
The heaviest 24-hour snowfall measured in Changlong between 1940 and 2025 was 29 January 1977, with 5.8 cm.
Are there tropical nights in Changlong?
Yes: Changlong has on average 112 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Changlong?
In Changlong, between 1940 and 2025, the highest apparent temperature reached 46.9 °C on 5 August 1994, and the lowest was -10.9 °C on 12 February 1945.
Compare Changlong with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Changlong