The highest day temperature in December 2023 was 40°F. The lowest night temperature was -4°F. The average values for day and night temperatures during December were 26.0°F и 16.5°F respectivly.

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

Precipitation total in December for Idaho Falls is 0.6 in.

The average wind speed in December is 6.3 mph. It makes December one of the most windless months of the year for Idaho Falls.

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 Idaho Falls in December is 3.8 hours.