Climate averages 1991–2020
Osorno weather
by month.
See how the year changes. February has the highest average daily maximum; January has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: JanuaryFebruary
Long-term climate patterns, not a forecast for a particular trip.
Across the year Osorno averages a daytime high of 15.7°C and a nighttime low of 7.1°C, with about 1,537 mm of rain on roughly 149 days. February is the warmest month (average high 22.0°C) and July the coolest (10.3°C). June is the wettest month with 251 mm; January is the driest with 39 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): January and February. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in Osorno
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Osorno climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.5°C11.0°C | 11.0°C | 39 | 6.2 | 14.715 h |
| February | 22.0°C11.1°C | 11.1°C | 42 | 5.3 | 13.714 h |
| March | 19.6°C9.7°C | 9.7°C | 65 | 8.5 | 12.412 h |
| April | 15.9°C7.4°C | 7.4°C | 114 | 11.6 | 11.011 h |
| May | 13.2°C6.1°C | 6.1°C | 194 | 15.4 | 9.910 h |
| June | 10.7°C4.5°C | 4.5°C | 251 | 18.8 | 9.39 h |
| July | 10.3°C3.4°C | 3.4°C | 231 | 17.9 | 9.610 h |
| August | 11.2°C3.8°C | 3.8°C | 213 | 18.6 | 10.511 h |
| September | 12.9°C4.5°C | 4.5°C | 129 | 14.0 | 11.812 h |
| October | 14.7°C5.9°C | 5.9°C | 114 | 13.6 | 13.113 h |
| November | 16.7°C7.7°C | 7.7°C | 77 | 10.6 | 14.414 h |
| December | 19.2°C9.6°C | 9.6°C | 67 | 8.2 | 15.015 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- ValdiviaChile · 85 kmHigh 15.8°C · Low 8.6°C · 1,919 mm rain a year
- Puerto MonttChile · 101 kmHigh 14.2°C · Low 8.2°C · 2,294 mm rain a year
- San Carlos de BarilocheArgentina · 166 kmHigh 11.5°C · Low 4.2°C · 976 mm rain a year
- Padre Las CasasChile · 207 kmHigh 16.9°C · Low 7.0°C · 1,435 mm rain a year
- TemucoChile · 209 kmHigh 17.3°C · Low 7.3°C · 1,435 mm rain a year
- Los ÁngelesChile · 352 kmHigh 18.8°C · Low 8.0°C · 1,184 mm rain a year
- Villa Mercedes, ChileChile · 366 kmHigh 17.7°C · Low 7.3°C · 1,739 mm rain a year
- CoronelChile · 394 kmHigh 18.2°C · Low 9.8°C · 1,082 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-4, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at -40.60°, -73.10° (4 km from the city centre), adjusted up by 0.3°C for the difference between the city's elevation (37 m) and the cell's (86 m). Rain comes from the 0.25° cell at -40.50°, -73.25°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.