The climate in Sandusky during September can be summarized as warm and reasonably dry.
September is in the fall / autumn in Sandusky and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 12°C (54°F) is normal.
| Daytime temperature | 23.6°C 74.5°F | 
|---|---|
| Nightly temperature | 12.4°C 54.3°F | 
| Average temperature | 18°C 64.4°F | 
| Daily sunshine | 7.4 hrs | 
| Avg rainfall | 76 mm 3 ins | 
| Rainy days | 8 days | 
| Sea temperature | 21.2°C 70.2°F | 
| Humidity | 74% | 
| Windspeed | 13.3kph 8 mph | 
On average September is the 6th wettest month of the year in Sandusky with around 76mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.4 hours of sunshine per day.
 
				 
						 
						The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sandusky in September 2025.
Best places to visit in September
| Hottest month: | July | 28°C 82.4°F | 
|---|---|---|
| Driest month: | February | 45mm 1.8ins | 
| Sunniest month: | July | 10hrs | 
| Coldest month: | January | -0.6°C 30.9°F | 
| Wettest month: | June | 96mm 3.8ins | 
 
	 
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