World Resorts USA New Castle Weather

New Castle weather in January

Weather in New Castle: January

Average day temperature: 39.1°F
Average night temperature: 32.6°F
Sea water temperature: 38.2°F
Number of sunny days: 11 days
Day length: 9.4 - 10.2 hours
Number of rainy days: 2 days
Precipitation totals: 0.9 in.

Air temperature in January, °F

Show year:
2025
2024
2023

The highest day temperature during January of 2025 was 46°F. At the same time the lowest night temperature was 12°F. Daily and nightly averages during January were 33.8°F and 24.8°F.

Sea water temperature in New Castle in January, °F

Show year:
2025
2024
2023

The average sea water temperature in January of 2025 was 35.4°F. The highest and lowest sea temperatures during the month were 41.7°F and 31.8°F.

Sunny, partly cloudy and cloudy days

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.

Wind speed in January, mph

The average wind speed value in January is 8.4 mph It makes January one of the most windy months of the year.

Average sunny hours

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: 5.3.

Best time for vacation in New Castle

Sunniest months:
November 17 days
October 16 days
September 15 days
Warmest months:
July 85.5 °F
August 82.4 °F
June 79.8 °F
Warmest sea temp:
July 80.8 °F
August 80.0 °F
September 74.5 °F
Coldest months:
January 39.1 °F
February 42.3 °F
December 43.9 °F
Rainiest months:
July 3 days
August 3 days
April 3 days
Windiest months:
March 9.2 mph
April 8.8 mph
January 8.4 mph

New Castle on a weather map

New Castle
+30°F
S 9 mph
Feels like: +21°F
Precip.: 0%
Places in USA:
Name
°F
+30°F
+77°F
+77°F
+45°F
+55°F
+70°F
+77°F
+70°F
+25°F
+57°F
+48°F
+63°F
+63°F
+46°F
+5°F
24 Hours Forecast
New Castle
Local time: 23:53
December 05, friday
0000
30°F
S
9 mph
0300
28°F
SW
7 mph
0600
27°F
W
3 mph
0900
25°F
NW
6 mph
1200
28°F
NW
2 mph
1500
30°F
NW
2 mph
1800
30°F
S
2 mph
2100
28°F
SW
2 mph
Units of measurement: °C / °F