The highest day temperature in January 2026 was 57°F. The lowest night temperature was -4°F. The average values for day and night temperatures during January were 34.1°F и 22.1°F respectivly.

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

Precipitation total in January for Harpers Ferry is 1.0 in.

The average wind speed in January is 7.9 mph. It makes January one of the most windy months of the year for Harpers Ferry.

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 Harpers Ferry in January is 5.6 hours.