Osorno in Summer
In summer (December, January and February), Osorno sees average daytime highs around 21°C and overnight lows near 10°C, with 147 mm of rain over about 20 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 18°C in early December to 21°C by late February. The sky is clear or mostly clear about 38% of the time across summer, and the air most often feels dry.
Summer is Osorno's best season of the year to visit on our travel score. For the whole year in context, see Osorno's year-round climate.
- Avg daytime high
- 21°C
- warmest season of the year
- Avg overnight low
- 10°C
- Rainfall
- 147 mm
- 20 wet days
- Avg wind
- 11 km/h
- Travel score
- 7.1
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Osorno in Summer
Over the season highs climb from about 18°C in early December to 21°C by late February.
A typical summer day in Osorno reaches about 21°C and drops to 10°C overnight. The warmest of the three months is February, the coolest December.
Osorno weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 21° / 10° | 39 | 6.2 | 14.6 | 7.3 |
| Feb | 22° / 10° | 41 | 5.2 | 13.6 | 7.5 |
| Mar | 19° / 9° | 65 | 8.3 | 12.3 | 6.5 |
| Apr | 16° / 7° | 114 | 11.4 | 11 | 4.6 |
| May | 13° / 6° | 194 | 15.7 | 9.8 | 3.0 |
| Jun | 10° / 4° | 251 | 18.8 | 9.2 | 1.9 |
| Jul | 10° / 3° | 232 | 18.2 | 9.4 | 1.8 |
| Aug | 11° / 4° | 213 | 18.3 | 10.4 | 2.2 |
| Sep | 13° / 4° | 129 | 14.3 | 11.7 | 3.1 |
| Oct | 15° / 6° | 114 | 13.7 | 13.1 | 4.0 |
| Nov | 17° / 7° | 77 | 10.5 | 14.3 | 5.1 |
| Dec | 19° / 9° | 67 | 8.2 | 14.8 | 6.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 38% of the time across summer.
Chance of precipitation in Summer
Osorno gets around 147 mm of rain over 20 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 11 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 42 min in early December to 13 h 06 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.7 kWh/m².
Hazard calendar for Osorno
None of Osorno's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Osorno's rainy season runs April–October, when most of the year's rain falls.
Is summer a good time to visit Osorno?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Osorno for general sightseeing.
What to pack for Osorno in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Osorno sees daytime highs around 21°C and nights near 10°C. Pack sun protection. Worth having: rain gear. About 20 days see rain.
Sea temperature near Osorno in Summer
The nearest coast averages about 14°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 63 km away) is warmest in January at about 15°C and coldest in August near 11°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 14 | 14 | 14 | 13 | 12 | 11 | 11 | 11 | 12 | 13 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 14 | Bracing |
| Mar | 14 | Bracing |
| Apr | 14 | Bracing |
| May | 13 | Bracing |
| Jun | 12 | Bracing |
| Jul | 11 | Bracing |
| Aug | 11 | Bracing |
| Sep | 11 | Bracing |
| Oct | 12 | Bracing |
| Nov | 13 | Bracing |
| Dec | 14 | Bracing |
UV index in Osorno in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Osorno peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 11 | 7 | 5 | 2 | 2 | 2 | 3 | 4 | 7 | 9 | 12 |
| Level | Extreme | Extreme | Very high | Moderate | Moderate | Low | Low | Moderate | Moderate | High | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 11 | Extreme |
| Mar | 7 | Very high |
| Apr | 5 | Moderate |
| May | 2 | Moderate |
| Jun | 2 | Low |
| Jul | 2 | Low |
| Aug | 3 | Moderate |
| Sep | 4 | Moderate |
| Oct | 7 | High |
| Nov | 9 | Very high |
| Dec | 12 | Extreme |
Air quality in Osorno in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Osorno is worst in March — around 43 µg/m³ PM2.5 (poor), about 1.9× the cleanest month (February, 23 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Osorno's WHO annual average of 33.8 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 23 | 23 | 43 | 42 | 36 | 34 | 35 | 40 | 39 | 34 | 31 | 26 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 23 | Moderate |
| Feb | 23 | Moderate |
| Mar | 43 | Poor |
| Apr | 42 | Poor |
| May | 36 | Poor |
| Jun | 34 | Moderate |
| Jul | 35 | Moderate |
| Aug | 40 | Poor |
| Sep | 39 | Poor |
| Oct | 34 | Moderate |
| Nov | 31 | Moderate |
| Dec | 26 | Moderate |
Where is Osorno?
Osorno sits at 40.6°S, 73.1°W, 37 m above sea level, in Chile. The nearest listed city is Río Bueno, 31 km away.
Topography around Osorno
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Osorno.
Within 3 km, the terrain around Osorno has only modest variations in elevation — a maximum elevation change of 68 m around an average of 47 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 284 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,650 m.
The land around Osorno is covered by artificial surfaces (40%), trees (23%) and grassland (23%) within 3 km, grassland (45%), cropland (26%) and trees (25%) within 16 km, and trees (49%) and grassland (23%) within 80 km.
Chile travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / L
- 220 V · 50 Hz
- Prices
- ≈ 48% of US
- price level, 2025
- GDP per capita
- $17,995
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 6.3
- per 100k, 2023
- Road deaths
- 14.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 517
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Osorno (-40.574°, -73.1335°, elevation 37 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.