Chillán Viejo climate — normals and trends
Chillán Viejo (Chile) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 13.5 °C and it receives 912 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 January (19.8 °C on average) and the coldest is July (7.9 °C). Rainfall peaks in June.
Chillán Viejo averages 9 frost days, 17 hot days (≥ 30 °C) and 75 rainy days per year.
No statistically significant temperature trend emerges for Chillán Viejo between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 39.0 °C (on 3 February 2023) and the coldest -6.7 °C (on 30 June 2025).
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
Chillán ViejoÑuble
- coords
- -36.62°, -72.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.5°C
Average daily high
19.8°C
Average daily low
8.1°C
Annual rainfall
912mm
Sunshine / day
10.3h
Mean relative humidity
73%
Average peak wind
17.8km/h
Seasonal range
11.9°C
Frost days (< 0 °C)
9 d/yr
Hot days (≥ 30 °C)
17 d/yr
Rainy days (≥ 1 mm)
75 d/yr
Annual snowfall
0.2 cm
Average feels-like high
18.4 °C
Average feels-like low
5.6 °C
Average peak gust
36.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
No clear trend over this period
Over a short window, year-to-year swings outweigh the climate signal. Try 86 years.
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
39.0 °C
3 February 2023
Coldest day
-6.7 °C
30 June 2025
Wettest day
139 mm
4 May 1992
Windiest day
49.8 km/h
9 October 1987
Strongest gust
119.5 km/h
11 July 1987
Hottest feels-like
40.5 °C
3 February 2023
Coldest feels-like
-10.7 °C
30 June 2025
Snowiest day
9.2 cm
26 June 1946
Sunniest day
14.4 h
14 December 2024
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 | 30.6 °C | +3.1 °C | 0 mm | -9 mm |
| Feb | 29.5 °C | +2.2 °C | 0 mm | -12 mm |
| Mar | 25.9 °C | +1.2 °C | 43 mm | +25 mm |
| Apr | 19.2 °C | -0.7 °C | 66 mm | +10 mm |
| May | 15.1 °C | -0.3 °C | 109 mm | -52 mm |
| Jun | 12.5 °C | -0.3 °C | 155 mm | -51 mm |
| Jul | 13.8 °C | +1.2 °C | 142 mm | -29 mm |
| Aug | 15.2 °C | +1.2 °C | 68 mm | -56 mm |
| Sep | 17.0 °C | +0.9 °C | 83 mm | +7 mm |
| Oct | 20.9 °C | +2.1 °C | 34 mm | -11 mm |
| Nov | 24.6 °C | +2.1 °C | 5 mm | -17 mm |
| Dec | 27.7 °C | +2.0 °C | 17 mm | +4 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 Chillán Viejo?
Chillán Viejo has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 13.5 °C and it receives 912 mm of precipitation per year.
What is the hottest day ever recorded in Chillán Viejo?
The hottest day measured in Chillán Viejo between 1940 and 2025 was 3 February 2023, reaching 39.0 °C.
What is the coldest day in Chillán Viejo?
The coldest day measured in Chillán Viejo between 1940 and 2025 was 30 June 2025, at -6.7 °C.
Does it snow in Chillán Viejo?
Almost never: Chillán Viejo sees virtually no snow, with about 9 frost days per year.
Has the climate of Chillán Viejo warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in Chillán Viejo.
What is the wettest day in Chillán Viejo?
The wettest day measured in Chillán Viejo between 1940 and 2025 was 4 May 1992, with 139 mm of rain in 24 hours.
What was the windiest day in Chillán Viejo?
The windiest day measured in Chillán Viejo between 1940 and 2025 was 9 October 1987, with winds reaching 49.8 km/h.
What is the warmest month in Chillán Viejo?
The warmest month in Chillán Viejo is January (19.8 °C on average); the coldest is July (7.9 °C).
How much does it rain in Chillán Viejo?
Chillán Viejo receives on average 912 mm of precipitation per year, spread over about 75 rainy days.
Is it sunny in Chillán Viejo?
Chillán Viejo gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chillán Viejo?
The heaviest 24-hour snowfall measured in Chillán Viejo between 1940 and 2025 was 26 June 1946, with 9.2 cm.
Are there tropical nights in Chillán Viejo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Chillán Viejo.
What was the most extreme apparent temperature in Chillán Viejo?
In Chillán Viejo, between 1940 and 2025, the highest apparent temperature reached 40.5 °C on 3 February 2023, and the lowest was -10.7 °C on 30 June 2025.
Compare Chillán Viejo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chillán Viejo