The highest day temperature in July 2025 was 79°F. The lowest night temperature was 52°F. The average values for day and night temperatures during July were 69.5°F и 60.2°F respectivly.

The average sea surface temperature in July 2025 for Grand Marais was 54.0°F. The maximum and minimum values were 41.2°F and 68.2°F respectively.

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

Precipitation total in July for Grand Marais is 0.8 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 5.9 mph. It makes July the most windless month of the year for Grand Marais.

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 July is 9.0 hours.