The highest day temperature in September 2023 was 79°F. The lowest night temperature was 46°F. The average values for day and night temperatures during September were 66.9°F и 54.4°F respectivly.

The average sea surface temperature in September 2023 for Jonkoping was 59.8°F. The maximum and minimum values were 53.4°F and 63.2°F respectively.

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

Precipitation total in September for Jonkoping is 1.3 in.

The average wind speed in September is 8.6 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 Jonkoping in September is 6.3 hours.