The highest day temperature in January 2026 was 48°F. The lowest night temperature was 1°F. The average values for day and night temperatures during January were 32.3°F и 24.3°F respectivly.

The average sea surface temperature in January 2026 for Westerly was 38.9°F. The maximum and minimum values were 36.6°F and 41.4°F respectively.

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

Precipitation total in January for Westerly is 1.1 in. This value is relatively stable throughout the year.

The average wind speed in January is 10.5 mph. It makes January one of the most windy months of the year for Westerly.

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 Westerly in January is 5.3 hours.