The highest day temperature in September 2025 was 67°F. The lowest night temperature was 28°F. The average values for day and night temperatures during September were 56.1°F и 40.3°F respectivly.

Most of the days in September are gloomy but you can also expect sunny days.

Precipitation total in September for Osorno is 1.6 in.

The average wind speed in September is 3.6 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Osorno in September is 3.4 hours.