Weather in Dewey Beach: September
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Average day temperature: | 74.0°F |
| Average night temperature: | 68.4°F | |
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Sea water temperature: | 73.2°F |
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Number of sunny days: | 13 days |
| Day length: | 11.8 - 13.0 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
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| Dewey Beach |
temperature
| Dewey Beach |
Air temperature in September, °F
| Day temperature | Night temperature |
The highest day temperature during September of 2024 was 79°F. At the same time the lowest night temperature was 60°F. Daily and nightly averages during September were 72.1°F and 68.0°F.
Sea water temperature in Dewey Beach in September, °F
The average sea water temperature in September of 2024 was 71.6°F. The highest and lowest sea temperatures during the month were 74.1°F and 69.6°F.
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| Partly cloudy days | |
| Cloudy days |
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Dewey Beach in September is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in September is 11.1 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 7.5.
Best time for vacation in Dewey Beach
Dewey Beach on a weather map
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