The highest day temperature in September 2024 was 80°F. The lowest night temperature was 30°F. The average values for day and night temperatures during September were 60.2°F и 48.2°F respectivly.

The average sea surface temperature in September 2024 for Sundsvall was 58.2°F. The maximum and minimum values were 51.2°F and 61.6°F respectively.

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

Precipitation total in September for Sundsvall is 1.8 in.

The average wind speed in September is 6.7 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 Sundsvall in September is 6.5 hours.