The highest day temperature in December 2025 was 51°F. The lowest night temperature was 16°F. The average values for day and night temperatures during December were 38.1°F и 32.5°F respectivly.

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

Precipitation total in December for Jasna is 1.9 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 4.3 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 Jasna in December is 3.1 hours.