Greencastle

What is the climate like in Greencastle?

The best time to visit Greencastle is typically August – September, with trip comfort peaking in September (7.4/10). Greencastle is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 24°F (-5°C). The wettest month is typically March and the driest is September; the year sees roughly 45 in (1144 mm) of precipitation.

• Best time to visitAugust – September — comfort peaks in September (7.4/10)
• Warmest monthJuly — average high 85°F (29°C)
• Coolest monthJanuary — average low 24°F (-5°C)
• Wettest monthMarch (5.1 in (129 mm))
• Driest monthSeptember (2.7 in (70 mm))
• Annual precipitation45 in (1144 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromRockville, 34 km away (1893-2026)