Weather in Dewey Beach: January
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Average day temperature: | 40.5°F |
| Average night temperature: | 36.3°F | |
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Sea water temperature: | 41.9°F |
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Number of sunny days: | 14 days |
| Day length: | 9.5 - 10.2 hours | |
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Number of days with precipitation: | 3 days |
| Precipitation totals: | 1.2 in. | |
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forecast
| Dewey Beach |
temperature
| Dewey Beach |
Air temperature in January, °F
The highest day temperature during January of 2026 was 53°F. At the same time the lowest night temperature was 16°F. Daily and nightly averages during January were 36.6°F and 32.0°F.
Sea water temperature in Dewey Beach in January, °F
The average sea water temperature in January of 2026 was 39.2°F. The highest and lowest sea temperatures during the month were 42.1°F and 34.7°F.
Mostly all days in January are sunny but cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in Dewey Beach in January is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in January is 13.1 mph It makes January one of the most windy months of the year.
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 January is: 5.9.
Best time for vacation in Dewey Beach
Dewey Beach on a weather map
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