The highest day temperature in September 2023 was 78°F. The lowest night temperature was 42°F. The average values for day and night temperatures during September were 68.6°F и 54.7°F respectivly.

The average sea surface temperature in September 2023 for Shlisselburg was 59.8°F. The maximum and minimum values were 55.8°F and 65.2°F respectively.

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

Precipitation total in September for Shlisselburg is 0.8 in.

The average wind speed in September is 8.1 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 Shlisselburg in September is 5.5 hours.