The highest day temperature in September 2025 was 73°F. The lowest night temperature was 22°F. The average values for day and night temperatures during September were 57.3°F и 40.2°F respectivly.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Saint-Vincent is 1.6 in.

The average wind speed in September is 3.5 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 Saint-Vincent in September is 6.7 hours.