The highest day temperature in September 2023 was 88°F. The lowest night temperature was 61°F. The average values for day and night temperatures during September were 80.0°F и 68.0°F respectivly.

The average sea surface temperature in September 2023 for St Constantine and Helena was 78.7°F. The maximum and minimum values were 76.2°F and 83.4°F respectively.

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

Precipitation total in September for St Constantine and Helena is 0.8 in. It makes september the least rainy month of the year.

The average wind speed in September is 10.2 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 St Constantine and Helena in September is 9.9 hours.