The highest day temperature in June 2025 was 109°F. The lowest night temperature was 49°F. The average values for day and night temperatures during June were 86.3°F и 69.5°F respectivly.

The average sea surface temperature in June 2025 for New Castle was 72.7°F. The maximum and minimum values were 64.8°F and 81.6°F respectively.

Most of the days in June are sunny but you can also expect cloudy and gloomy days.

Precipitation total in June for New Castle is 0.9 in. It makes june one of the least rainy months of the year.

The average wind speed in June is 6.9 mph. It makes June one of the most windless 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 June is 8.9 hours.