Rockville

What is the climate like in Rockville?

The best time to visit Rockville is typically October, the year's most comfortable month (6.7/10). Rockville is warmest in July, when daily highs average 90°F (32°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 47 in (1199 mm) of precipitation.

• Best time to visitOctober — the year's comfort peak (6.7/10)
• Warmest monthJuly — average high 90°F (32°C)
• Coolest monthJanuary — average low 30°F (-1°C)
• Wettest monthJuly (5.8 in (147 mm))
• Driest monthNovember (2.9 in (74 mm))
• Annual precipitation47 in (1199 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromDalecarlia Rsvr, 16 km away (1948-2026)