The highest day temperature in March 2026 was 46°F. The lowest night temperature was -3°F. The average values for day and night temperatures during March were 33.6°F и 25.2°F respectivly.

The average sea surface temperature in March 2026 for Saint John was 33.4°F. The maximum and minimum values were 32.0°F and 34.8°F respectively.

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

Precipitation total in March for Saint John is 1.2 in. It makes march one of the most rainy months of the year.

The average wind speed in March is 9.0 mph. It makes March the most windy month of the year for Saint John.

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 Saint John in March is 4.8 hours.