The highest day temperature in January 2026 was 40°F. The lowest night temperature was -10°F. The average values for day and night temperatures during January were 19.3°F и 14.9°F respectivly.

The average sea surface temperature in January 2026 for Summerside was 28.4°F. The maximum and minimum values were 27.0°F and 29.8°F respectively.

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

Precipitation total in January for Summerside is 1.2 in.

The average wind speed in January is 14.3 mph. It makes January one of the most windy months of the year for Summerside.

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 Summerside in January is 2.9 hours.