Osorno climate — normals and trends
Osorno (Chile) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 10.6 °C and it receives 1,545 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 (15.2 °C on average) and the coldest is July (6.5 °C). Rainfall peaks in June.
Osorno averages 21 frost days, 1 hot days (≥ 30 °C) and 156 rainy days per year.
Osorno has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The number of frost days there went from about 17 to 25 per year over the period.
The hottest day of the period reached 36.5 °C (on 3 February 2019) and the coldest -7.6 °C (on 9 July 2007).
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
OsornoLos Lagos Region
- coords
- -40.57°, -73.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.6°C
Average daily high
15.1°C
Average daily low
6.3°C
Annual rainfall
1,545mm
Sunshine / day
8.8h
Mean relative humidity
81%
Average peak wind
15.8km/h
Seasonal range
8.7°C
Frost days (< 0 °C)
21 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
156 d/yr
Annual snowfall
1.5 cm
Average feels-like high
13.5 °C
Average feels-like low
3.9 °C
Average peak gust
39.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.26 · 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
36.5 °C
3 February 2019
Coldest day
-7.6 °C
9 July 2007
Wettest day
109 mm
2 June 2000
Windiest day
45.7 km/h
23 June 1994
Strongest gust
122.4 km/h
9 May 1980
Hottest feels-like
38.8 °C
25 January 1944
Coldest feels-like
-11.8 °C
9 July 2007
Snowiest day
14.8 cm
13 August 1941
Sunniest day
14.7 h
9 December 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 | 22.9 °C | +2.2 °C | 27 mm | -19 mm |
| Feb | 21.2 °C | +0.2 °C | 43 mm | +3 mm |
| Mar | 19.1 °C | +0.3 °C | 67 mm | +1 mm |
| Apr | 15.2 °C | -0.1 °C | 184 mm | +64 mm |
| May | 12.4 °C | 0.0 °C | 181 mm | -32 mm |
| Jun | 9.9 °C | -0.3 °C | 201 mm | -42 mm |
| Jul | 11.0 °C | +1.2 °C | 194 mm | -39 mm |
| Aug | 12.7 °C | +1.9 °C | 116 mm | -83 mm |
| Sep | 13.6 °C | +1.1 °C | 188 mm | +48 mm |
| Oct | 15.3 °C | +0.9 °C | 121 mm | +11 mm |
| Nov | 19.1 °C | +2.6 °C | 36 mm | -36 mm |
| Dec | 20.0 °C | +1.2 °C | 47 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 Osorno?
Osorno has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 10.6 °C and it receives 1,545 mm of precipitation per year.
What is the hottest day ever recorded in Osorno?
The hottest day measured in Osorno between 1940 and 2025 was 3 February 2019, reaching 36.5 °C.
What is the coldest day in Osorno?
The coldest day measured in Osorno between 1940 and 2025 was 9 July 2007, at -7.6 °C.
Does it snow in Osorno?
Yes. Osorno gets on average 1.5 cm of snow per year and has around 21 frost days.
Has the climate of Osorno warmed?
Yes: Osorno warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Osorno?
The wettest day measured in Osorno between 1940 and 2025 was 2 June 2000, with 109 mm of rain in 24 hours.
What was the windiest day in Osorno?
The windiest day measured in Osorno between 1940 and 2025 was 23 June 1994, with winds reaching 45.7 km/h.
What is the warmest month in Osorno?
The warmest month in Osorno is January (15.2 °C on average); the coldest is July (6.5 °C).
How much does it rain in Osorno?
Osorno receives on average 1,545 mm of precipitation per year, spread over about 156 rainy days.
Is it sunny in Osorno?
Osorno gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Osorno?
The heaviest 24-hour snowfall measured in Osorno between 1940 and 2025 was 13 August 1941, with 14.8 cm.
Are there tropical nights in Osorno?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Osorno.
What was the most extreme apparent temperature in Osorno?
In Osorno, between 1940 and 2025, the highest apparent temperature reached 38.8 °C on 25 January 1944, and the lowest was -11.8 °C on 9 July 2007.
Compare Osorno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Osorno