Weather in New Castle: January
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Average day temperature: | 38.6°F |
| Average night temperature: | 31.5°F | |
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Sea water temperature: | 37.8°F |
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Number of sunny days: | 12 days |
| Day length: | 9.4 - 10.2 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.9 in. | |
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forecast
| New Castle |
temperature
| New Castle |
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 1°F. Daily and nightly averages during January were 35.3°F and 25.2°F.
Sea water temperature in New Castle in January, °F
The average sea water temperature in January of 2026 was 35.5°F. The highest and lowest sea temperatures during the month were 37.9°F and 31.5°F.
Number of sunny, partly cloudy and cloudy days in January is almost equal.
Precipitation total in January, in.
Precipitation total value in New Castle in January is 0.9 in. Other months of the year show relatively similar values.
The average wind speed value in January is 8.5 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: 5.6.
Best time for vacation in New Castle
New Castle on a weather map
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