The highest day temperature in July 2025 was 95°F. The lowest night temperature was 64°F. The average values for day and night temperatures during July were 84.7°F и 73.3°F respectivly.

The average sea surface temperature in July 2025 for Sandusky was 83.0°F. The maximum and minimum values were 79.6°F and 85.2°F respectively.

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

Precipitation total in July for Sandusky is 1.5 in. It makes july the most rainy month of the year.

The average wind speed in July is 8.5 mph. It makes July the most windless month of the year for Sandusky.

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 Sandusky in July is 9.1 hours.