The highest day temperature in September 2026 was 89°F. The lowest night temperature was 47°F. The average values for day and night temperatures during September were 67.2°F и 56.2°F respectivly.

The average sea surface temperature in September 2026 for Marquette was 64.6°F. The maximum and minimum values were 60.8°F and 69.8°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Marquette is 0.7 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 8.6 mph. It makes September one of the most windless months of the year for Marquette.

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 Marquette in September is 7.2 hours.