The highest day temperature in September 2026 was 79°F. The lowest night temperature was 36°F. The average values for day and night temperatures during September were 62.6°F и 48.6°F respectivly.

The average sea surface temperature in September 2026 for Montevideo was 56.3°F. The maximum and minimum values were 54.4°F and 59.0°F respectively.

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

Precipitation total in September for Montevideo is 2.6 in.

The average wind speed in September is 10.3 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 Montevideo in September is 7.5 hours.