Balu climate — normals and trends
Balu (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 14.6 °C and it receives 986 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 (27.2 °C on average) and the coldest is January (0.2 °C). Rainfall peaks in July.
Balu averages 73 frost days, 58 hot days (≥ 30 °C) and 90 rainy days per year.
Balu has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 85 to 61 per year over the period.
The hottest day of the period reached 40.9 °C (on 11 August 1946) and the coldest -23.8 °C (on 11 January 1955).
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
BaluJiangsu
- coords
- 34.19°, 117.91°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.6°C
Average daily high
19.1°C
Average daily low
10.5°C
Annual rainfall
986mm
Sunshine / day
8.5h
Mean relative humidity
72%
Average peak wind
15.0km/h
Seasonal range
27.0°C
Frost days (< 0 °C)
73 d/yr
Hot days (≥ 30 °C)
58 d/yr
Rainy days (≥ 1 mm)
90 d/yr
Annual snowfall
13.8 cm
Average feels-like high
18.7 °C
Average feels-like low
9.5 °C
Average peak gust
30.3 km/h
Tropical nights (≥ 20 °C)
89 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.28 · 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
40.9 °C
11 August 1946
Coldest day
-23.8 °C
11 January 1955
Wettest day
156 mm
29 June 1942
Windiest day
43.5 km/h
17 April 1946
Strongest gust
88.2 km/h
28 July 2021
Hottest feels-like
45.4 °C
19 July 1988
Coldest feels-like
-29.5 °C
11 January 1955
Snowiest day
16.2 cm
7 February 1964
Sunniest day
14.0 h
3 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 | 8.6 °C | +3.8 °C | 4 mm | -15 mm |
| Feb | 9.1 °C | +1.8 °C | 5 mm | -22 mm |
| Mar | 16.5 °C | +3.4 °C | 47 mm | +6 mm |
| Apr | 24.2 °C | +4.4 °C | 22 mm | -34 mm |
| May | 27.0 °C | +1.8 °C | 31 mm | -44 mm |
| Jun | 31.1 °C | +1.6 °C | 135 mm | +17 mm |
| Jul | 34.2 °C | +3.5 °C | 40 mm | -237 mm |
| Aug | 32.3 °C | +2.1 °C | 241 mm | +74 mm |
| Sep | 26.2 °C | +0.1 °C | 317 mm | +212 mm |
| Oct | 19.9 °C | -1.1 °C | 135 mm | +87 mm |
| Nov | 16.9 °C | +2.9 °C | 15 mm | -18 mm |
| Dec | 9.9 °C | +2.7 °C | 12 mm | -6 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 Balu?
Balu has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 14.6 °C and it receives 986 mm of precipitation per year.
What is the hottest day ever recorded in Balu?
The hottest day measured in Balu between 1940 and 2025 was 11 August 1946, reaching 40.9 °C.
What is the coldest day in Balu?
The coldest day measured in Balu between 1940 and 2025 was 11 January 1955, at -23.8 °C.
Does it snow in Balu?
Yes. Balu gets on average 13.8 cm of snow per year and has around 73 frost days.
Has the climate of Balu warmed?
Yes: Balu warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Balu?
The wettest day measured in Balu between 1940 and 2025 was 29 June 1942, with 156 mm of rain in 24 hours.
What was the windiest day in Balu?
The windiest day measured in Balu between 1940 and 2025 was 17 April 1946, with winds reaching 43.5 km/h.
What is the warmest month in Balu?
The warmest month in Balu is July (27.2 °C on average); the coldest is January (0.2 °C).
How much does it rain in Balu?
Balu receives on average 986 mm of precipitation per year, spread over about 90 rainy days.
Is it sunny in Balu?
Balu gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.
What is the biggest single-day snowfall in Balu?
The heaviest 24-hour snowfall measured in Balu between 1940 and 2025 was 7 February 1964, with 16.2 cm.
Are there tropical nights in Balu?
Yes: Balu has on average 89 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Balu?
In Balu, between 1940 and 2025, the highest apparent temperature reached 45.4 °C on 19 July 1988, and the lowest was -29.5 °C on 11 January 1955.
Compare Balu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Balu