The highest day temperature in January 2026 was 35°F. The lowest night temperature was 12°F. The average values for day and night temperatures during January were 24.0°F и 21.2°F respectivly.

The average sea surface temperature in January 2026 for Jonkoping was 38.7°F. The maximum and minimum values were 35.0°F and 42.4°F respectively.

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

Precipitation total in January for Jonkoping is 1.4 in.

The average wind speed in January is 9.9 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 January is 2.2 hours.