The highest day temperature in January 2026 was 45°F. The lowest night temperature was -5°F. The average values for day and night temperatures during January were 26.4°F и 20.8°F respectivly.

The average sea surface temperature in January 2026 for Rockland was 35.8°F. The maximum and minimum values were 33.4°F and 37.4°F respectively.

You can expect various weather conditions during January. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in January for Rockland is 1.1 in.

The average wind speed in January is 11.7 mph. It makes January one of the most windy months of the year for Rockland.

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 Rockland in January is 4.6 hours.