The highest day temperature in March 2026 was 40°F. The lowest night temperature was -6°F. The average values for day and night temperatures during March were 27.7°F и 22.2°F respectivly.

The average sea surface temperature in March 2026 for Grand Marais was 30.6°F. The maximum and minimum values were 30.2°F and 31.4°F respectively.

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

Precipitation total in March for Grand Marais is 0.7 in.

The average wind speed in March is 9.4 mph.

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 Grand Marais in March is 5.3 hours.