The highest day temperature in September 2025 was 61°F. The lowest night temperature was 27°F. The average values for day and night temperatures during September were 48.4°F и 36.6°F respectivly.

The average sea surface temperature in September 2025 for Rio Gallegos was 39.6°F. The maximum and minimum values were 37.0°F and 42.8°F respectively.

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

Precipitation total in September for Rio Gallegos is 0.3 in. This value is relatively stable throughout the year.

The average wind speed in September is 15.7 mph.

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 Rio Gallegos in September is 6.3 hours.