New Castle

What is the climate like in New Castle?

The best time to visit New Castle is typically September, the year's most comfortable month (6.5/10). New Castle is warmest in July, when daily highs average 83°F (28°C), and coolest in January, when lows fall to about 23°F (-5°C). The wettest month is typically May and the driest is November; the year sees roughly 52 in (1333 mm) of precipitation.

• Best time to visitSeptember — the year's comfort peak (6.5/10)
• Warmest monthJuly — average high 83°F (28°C)
• Coolest monthJanuary — average low 23°F (-5°C)
• Wettest monthMay (5.4 in (138 mm))
• Driest monthNovember (3.5 in (88 mm))
• Annual precipitation52 in (1333 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromNew Castle 1 N, 2 km away (1894-2020)