New Castle

What is the climate like in New Castle?

The best time to visit New Castle is typically October, the year's most comfortable month (6.5/10). New Castle is warmest in July, when daily highs average 87°F (31°C), and coolest in January, when lows fall to about 30°F (-1°C). The wettest month is typically July and the driest is November; the year sees roughly 48 in (1220 mm) of precipitation.

• Best time to visitOctober — the year's comfort peak (6.5/10)
• Warmest monthJuly — average high 87°F (31°C)
• Coolest monthJanuary — average low 30°F (-1°C)
• Wettest monthJuly (5.6 in (141 mm))
• Driest monthNovember (2.9 in (74 mm))
• Annual precipitation48 in (1220 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSalem, 13 km away (1888-2026)