Nanjian climate — normals and trends
Nanjian (China) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 15.5 °C and it receives 1,295 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 June (20.1 °C on average) and the coldest is January (9.0 °C). Rainfall peaks in July.
Nanjian averages 5 frost days, 2 hot days (≥ 30 °C) and 171 rainy days per year.
Nanjian has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 8 to 2 per year over the period.
The hottest day of the period reached 34.2 °C (on 31 May 2023) and the coldest -6.3 °C (on 12 December 1979).
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
NanjianYunnan
- coords
- 25.04°, 100.51°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.5°C
Average daily high
21.0°C
Average daily low
11.1°C
Annual rainfall
1,295mm
Sunshine / day
9.1h
Mean relative humidity
70%
Average peak wind
12.0km/h
Seasonal range
11.1°C
Frost days (< 0 °C)
5 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
171 d/yr
Annual snowfall
1.1 cm
Average feels-like high
20.2 °C
Average feels-like low
10.4 °C
Average peak gust
42.3 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
16.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.79 · 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
34.2 °C
31 May 2023
Coldest day
-6.3 °C
12 December 1979
Wettest day
96 mm
6 June 1979
Windiest day
25.7 km/h
4 March 2015
Strongest gust
89.3 km/h
17 January 1984
Hottest feels-like
33.1 °C
18 July 2009
Coldest feels-like
-9.9 °C
12 December 1979
Snowiest day
13.9 cm
28 December 1983
Sunniest day
13.1 h
2 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 | 16.3 °C | +0.7 °C | 21 mm | -6 mm |
| Feb | 19.8 °C | +2.0 °C | 7 mm | -19 mm |
| Mar | 21.6 °C | +0.6 °C | 37 mm | +6 mm |
| Apr | 25.0 °C | +1.4 °C | 29 mm | -13 mm |
| May | 24.5 °C | -0.2 °C | 176 mm | +87 mm |
| Jun | 25.1 °C | +0.8 °C | 238 mm | +38 mm |
| Jul | 25.6 °C | +2.1 °C | 352 mm | +78 mm |
| Aug | 24.5 °C | +0.8 °C | 261 mm | +2 mm |
| Sep | 24.3 °C | +1.3 °C | 205 mm | +35 mm |
| Oct | 22.4 °C | +1.6 °C | 128 mm | +16 mm |
| Nov | 18.0 °C | 0.0 °C | 96 mm | +51 mm |
| Dec | 17.7 °C | +2.1 °C | 1 mm | -21 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 Nanjian?
Nanjian has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 1,295 mm of precipitation per year.
What is the hottest day ever recorded in Nanjian?
The hottest day measured in Nanjian between 1940 and 2025 was 31 May 2023, reaching 34.2 °C.
What is the coldest day in Nanjian?
The coldest day measured in Nanjian between 1940 and 2025 was 12 December 1979, at -6.3 °C.
Does it snow in Nanjian?
Yes. Nanjian gets on average 1.1 cm of snow per year and has around 5 frost days.
Has the climate of Nanjian warmed?
Yes: Nanjian warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nanjian?
The wettest day measured in Nanjian between 1940 and 2025 was 6 June 1979, with 96 mm of rain in 24 hours.
What was the windiest day in Nanjian?
The windiest day measured in Nanjian between 1940 and 2025 was 4 March 2015, with winds reaching 25.7 km/h.
What is the warmest month in Nanjian?
The warmest month in Nanjian is June (20.1 °C on average); the coldest is January (9.0 °C).
How much does it rain in Nanjian?
Nanjian receives on average 1,295 mm of precipitation per year, spread over about 171 rainy days.
Is it sunny in Nanjian?
Nanjian gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Nanjian?
The heaviest 24-hour snowfall measured in Nanjian between 1940 and 2025 was 28 December 1983, with 13.9 cm.
Are there tropical nights in Nanjian?
Yes: Nanjian has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nanjian?
In Nanjian, between 1940 and 2025, the highest apparent temperature reached 33.1 °C on 18 July 2009, and the lowest was -9.9 °C on 12 December 1979.
Compare Nanjian with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nanjian