Longchang climate — normals and trends
Longchang (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.8 °C and it receives 1,376 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 (25.3 °C on average) and the coldest is January (4.8 °C). Rainfall peaks in June.
Longchang averages 20 frost days, 37 hot days (≥ 30 °C) and 193 rainy days per year.
Longchang has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The number of frost days there went from about 27 to 13 per year over the period.
The hottest day of the period reached 37.0 °C (on 19 August 2022) and the coldest -12.5 °C (on 30 January 1977).
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
LongchangGuizhou
- coords
- 26.67°, 107.92°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.8°C
Average daily high
19.5°C
Average daily low
12.7°C
Annual rainfall
1,376mm
Sunshine / day
5.5h
Mean relative humidity
80%
Average peak wind
14.1km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
20 d/yr
Hot days (≥ 30 °C)
37 d/yr
Rainy days (≥ 1 mm)
193 d/yr
Annual snowfall
15.6 cm
Average feels-like high
19.6 °C
Average feels-like low
12.3 °C
Average peak gust
32.2 km/h
Tropical nights (≥ 20 °C)
92 d/yr
Solar radiation
11.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.36 · 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
37.0 °C
19 August 2022
Coldest day
-12.5 °C
30 January 1977
Wettest day
112 mm
11 September 2020
Windiest day
45.9 km/h
27 May 1946
Strongest gust
88.2 km/h
7 June 1946
Hottest feels-like
42.3 °C
27 July 1971
Coldest feels-like
-17.2 °C
30 January 1977
Snowiest day
15.1 cm
28 December 1983
Sunniest day
13.6 h
3 July 1973
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 | 12.1 °C | +4.2 °C | 40 mm | -21 mm |
| Feb | 7.7 °C | -1.8 °C | 88 mm | +15 mm |
| Mar | 15.5 °C | +0.7 °C | 94 mm | -17 mm |
| Apr | 23.8 °C | +3.6 °C | 123 mm | -29 mm |
| May | 24.9 °C | +0.9 °C | 288 mm | +91 mm |
| Jun | 27.4 °C | +0.8 °C | 264 mm | +55 mm |
| Jul | 31.3 °C | +2.2 °C | 140 mm | +3 mm |
| Aug | 30.8 °C | +1.6 °C | 119 mm | -8 mm |
| Sep | 28.9 °C | +2.6 °C | 88 mm | -8 mm |
| Oct | 23.2 °C | +2.5 °C | 44 mm | -52 mm |
| Nov | 16.6 °C | +1.0 °C | 111 mm | +46 mm |
| Dec | 13.2 °C | +3.0 °C | 38 mm | -13 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 Longchang?
Longchang has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.8 °C and it receives 1,376 mm of precipitation per year.
What is the hottest day ever recorded in Longchang?
The hottest day measured in Longchang between 1940 and 2025 was 19 August 2022, reaching 37.0 °C.
What is the coldest day in Longchang?
The coldest day measured in Longchang between 1940 and 2025 was 30 January 1977, at -12.5 °C.
Does it snow in Longchang?
Yes. Longchang gets on average 15.6 cm of snow per year and has around 20 frost days.
Has the climate of Longchang warmed?
Yes: Longchang warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Longchang?
The wettest day measured in Longchang between 1940 and 2025 was 11 September 2020, with 112 mm of rain in 24 hours.
What was the windiest day in Longchang?
The windiest day measured in Longchang between 1940 and 2025 was 27 May 1946, with winds reaching 45.9 km/h.
What is the warmest month in Longchang?
The warmest month in Longchang is July (25.3 °C on average); the coldest is January (4.8 °C).
How much does it rain in Longchang?
Longchang receives on average 1,376 mm of precipitation per year, spread over about 193 rainy days.
Is it sunny in Longchang?
Longchang gets on average 5.5 hours of sunshine per day, roughly 2,008 hours per year over 1940-2025.
What is the biggest single-day snowfall in Longchang?
The heaviest 24-hour snowfall measured in Longchang between 1940 and 2025 was 28 December 1983, with 15.1 cm.
Are there tropical nights in Longchang?
Yes: Longchang has on average 92 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Longchang?
In Longchang, between 1940 and 2025, the highest apparent temperature reached 42.3 °C on 27 July 1971, and the lowest was -17.2 °C on 30 January 1977.
Compare Longchang with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Longchang