Charlestown

What is the climate like in Charlestown?

The best time to visit Charlestown is typically May – September, with trip comfort peaking in June (7.8/10). Charlestown is warmest in December, when daily highs average 75°F (24°C), and coolest in July, when lows fall to about 37°F (3°C). The wettest month is typically December and the driest is June; the year sees roughly 42 in (1077 mm) of precipitation.

• Best time to visitMay – September — comfort peaks in June (7.8/10)
• Warmest monthDecember — average high 75°F (24°C)
• Coolest monthJuly — average low 37°F (3°C)
• Wettest monthDecember (8.2 in (207 mm))
• Driest monthJune (0.3 in (7 mm))
• Annual precipitation42 in (1077 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)