Tonggu climate — normals and trends
Tonggu (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.1 °C and it receives 1,489 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 (25.4 °C on average) and the coldest is January (3.9 °C). Rainfall peaks in July.
Tonggu averages 23 frost days, 36 hot days (≥ 30 °C) and 157 rainy days per year.
Tonggu 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 33 to 13 per year over the period.
The hottest day of the period reached 38.0 °C (on 16 July 2025) and the coldest -14.8 °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
TongguChongqing Municipality
- coords
- 30.93°, 109.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.1°C
Average daily high
18.7°C
Average daily low
11.7°C
Annual rainfall
1,489mm
Sunshine / day
7.1h
Mean relative humidity
76%
Average peak wind
6.0km/h
Seasonal range
21.5°C
Frost days (< 0 °C)
23 d/yr
Hot days (≥ 30 °C)
36 d/yr
Rainy days (≥ 1 mm)
157 d/yr
Annual snowfall
22.7 cm
Average feels-like high
19.3 °C
Average feels-like low
11.6 °C
Average peak gust
26.5 km/h
Tropical nights (≥ 20 °C)
72 d/yr
Solar radiation
12.6 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
38.0 °C
16 July 2025
Coldest day
-14.8 °C
30 January 1977
Wettest day
417 mm
20 July 1987
Windiest day
19.2 km/h
25 May 1946
Strongest gust
85.0 km/h
28 May 1946
Hottest feels-like
43.0 °C
23 July 1961
Coldest feels-like
-19.5 °C
30 January 1977
Snowiest day
14.1 cm
15 December 1965
Sunniest day
13.7 h
27 June 1965
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 | 9.5 °C | +2.5 °C | 51 mm | +12 mm |
| Feb | 9.1 °C | +0.2 °C | 23 mm | -25 mm |
| Mar | 14.5 °C | +0.6 °C | 113 mm | +27 mm |
| Apr | 22.3 °C | +3.0 °C | 60 mm | -58 mm |
| May | 26.1 °C | +2.9 °C | 93 mm | -65 mm |
| Jun | 27.4 °C | +0.9 °C | 186 mm | -13 mm |
| Jul | 34.0 °C | +4.8 °C | 60 mm | -206 mm |
| Aug | 31.6 °C | +2.2 °C | 222 mm | +45 mm |
| Sep | 26.1 °C | +1.2 °C | 182 mm | +19 mm |
| Oct | 20.3 °C | +1.0 °C | 251 mm | +135 mm |
| Nov | 15.1 °C | +1.2 °C | 45 mm | -31 mm |
| Dec | 11.5 °C | +2.8 °C | 44 mm | +1 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 Tonggu?
Tonggu has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.1 °C and it receives 1,489 mm of precipitation per year.
What is the hottest day ever recorded in Tonggu?
The hottest day measured in Tonggu between 1940 and 2025 was 16 July 2025, reaching 38.0 °C.
What is the coldest day in Tonggu?
The coldest day measured in Tonggu between 1940 and 2025 was 30 January 1977, at -14.8 °C.
Does it snow in Tonggu?
Yes. Tonggu gets on average 22.7 cm of snow per year and has around 23 frost days.
Has the climate of Tonggu warmed?
Yes: Tonggu warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tonggu?
The wettest day measured in Tonggu between 1940 and 2025 was 20 July 1987, with 417 mm of rain in 24 hours.
What was the windiest day in Tonggu?
The windiest day measured in Tonggu between 1940 and 2025 was 25 May 1946, with winds reaching 19.2 km/h.
What is the warmest month in Tonggu?
The warmest month in Tonggu is July (25.4 °C on average); the coldest is January (3.9 °C).
How much does it rain in Tonggu?
Tonggu receives on average 1,489 mm of precipitation per year, spread over about 157 rainy days.
Is it sunny in Tonggu?
Tonggu gets on average 7.1 hours of sunshine per day, roughly 2,592 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tonggu?
The heaviest 24-hour snowfall measured in Tonggu between 1940 and 2025 was 15 December 1965, with 14.1 cm.
Are there tropical nights in Tonggu?
Yes: Tonggu has on average 72 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tonggu?
In Tonggu, between 1940 and 2025, the highest apparent temperature reached 43.0 °C on 23 July 1961, and the lowest was -19.5 °C on 30 January 1977.
Compare Tonggu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tonggu