Judian climate — normals and trends
Judian (China) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 8.5 °C and it receives 1,222 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 (15.1 °C on average) and the coldest is January (0.2 °C). Rainfall peaks in July.
Judian averages 124 frost days, 0 hot days (≥ 30 °C) and 185 rainy days per year.
Judian has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 139 to 109 per year over the period.
The hottest day of the period reached 26.0 °C (on 1 August 2024) and the coldest -29.0 °C (on 5 January 1983).
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
JudianYunnan
- coords
- 27.31°, 99.65°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.5°C
Average daily high
13.7°C
Average daily low
4.1°C
Annual rainfall
1,222mm
Sunshine / day
9.4h
Mean relative humidity
74%
Average peak wind
7.3km/h
Seasonal range
14.9°C
Frost days (< 0 °C)
124 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
185 d/yr
Annual snowfall
73.2 cm
Average feels-like high
12.3 °C
Average feels-like low
2.3 °C
Average peak gust
35.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.56 · 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
26.0 °C
1 August 2024
Coldest day
-29.0 °C
5 January 1983
Wettest day
56 mm
4 August 1957
Windiest day
18.7 km/h
14 April 1959
Strongest gust
90.7 km/h
17 January 1994
Hottest feels-like
28.1 °C
18 August 2016
Coldest feels-like
-33.4 °C
5 January 1983
Snowiest day
25.8 cm
19 October 1956
Sunniest day
13.2 h
31 May 1958
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 | 8.8 °C | +2.6 °C | 30 mm | +5 mm |
| Feb | 7.2 °C | +0.4 °C | 44 mm | +2 mm |
| Mar | 10.0 °C | 0.0 °C | 103 mm | +40 mm |
| Apr | 15.0 °C | +1.5 °C | 70 mm | +6 mm |
| May | 17.1 °C | 0.0 °C | 140 mm | +48 mm |
| Jun | 20.6 °C | +1.5 °C | 187 mm | +15 mm |
| Jul | 21.3 °C | +2.0 °C | 256 mm | +16 mm |
| Aug | 20.0 °C | +0.7 °C | 319 mm | +95 mm |
| Sep | 20.2 °C | +2.2 °C | 151 mm | -16 mm |
| Oct | 17.6 °C | +2.4 °C | 38 mm | -54 mm |
| Nov | 12.9 °C | +1.5 °C | 55 mm | +27 mm |
| Dec | 10.8 °C | +2.6 °C | 2 mm | -14 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 Judian?
Judian has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 8.5 °C and it receives 1,222 mm of precipitation per year.
What is the hottest day ever recorded in Judian?
The hottest day measured in Judian between 1940 and 2025 was 1 August 2024, reaching 26.0 °C.
What is the coldest day in Judian?
The coldest day measured in Judian between 1940 and 2025 was 5 January 1983, at -29.0 °C.
Does it snow in Judian?
Yes. Judian gets on average 73.2 cm of snow per year and has around 124 frost days.
Has the climate of Judian warmed?
Yes: Judian warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Judian?
The wettest day measured in Judian between 1940 and 2025 was 4 August 1957, with 56 mm of rain in 24 hours.
What was the windiest day in Judian?
The windiest day measured in Judian between 1940 and 2025 was 14 April 1959, with winds reaching 18.7 km/h.
What is the warmest month in Judian?
The warmest month in Judian is July (15.1 °C on average); the coldest is January (0.2 °C).
How much does it rain in Judian?
Judian receives on average 1,222 mm of precipitation per year, spread over about 185 rainy days.
Is it sunny in Judian?
Judian gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
What is the biggest single-day snowfall in Judian?
The heaviest 24-hour snowfall measured in Judian between 1940 and 2025 was 19 October 1956, with 25.8 cm.
Are there tropical nights in Judian?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Judian.
What was the most extreme apparent temperature in Judian?
In Judian, between 1940 and 2025, the highest apparent temperature reached 28.1 °C on 18 August 2016, and the lowest was -33.4 °C on 5 January 1983.
Compare Judian with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Judian