The highest day temperature in January 2026 was 53°F. The lowest night temperature was -6°F. The average values for day and night temperatures during January were 34.1°F и 20.3°F respectivly.

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

Precipitation total in January for Casper is 0.4 in.

The average wind speed in January is 11.6 mph. It makes January one of the most windy months of the year for Casper.

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 Casper in January is 6.0 hours.