The highest day temperature in April 2025 was 56°F. The lowest night temperature was 18°F. The average values for day and night temperatures during April were 42.0°F и 32.1°F respectivly.

The average sea surface temperature in April 2025 for Duluth was 33.9°F. The maximum and minimum values were 32.2°F and 37.4°F respectively.

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

Precipitation total in April for Duluth is 1.1 in. It makes april one of the most rainy months of the year.

The average wind speed in April is 8.9 mph. This value is relatively stable throughout the year.

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 Duluth in April is 4.8 hours.