The highest day temperature in April 2026 was 97°F. The lowest night temperature was 30°F. The average values for day and night temperatures during April were 67.5°F и 50.1°F respectivly.

The average sea surface temperature in April 2026 for New Castle was 56.8°F. The maximum and minimum values were 49.4°F and 62.6°F respectively.

You can expect various weather conditions during April. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in April for New Castle is 1.2 in. It makes april one of the most rainy months of the year.

The average wind speed in April is 8.7 mph. It makes April one of the most windy months of the year for New Castle.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for New Castle in April is 7.0 hours.