February in Rockville averages a daily high of 8.8°C with nights around -2.2°C. Expect roughly 8.9 wet days totalling 79.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Rockville is April–May.
Based on DALECARLIA RESERVOIR, MD US (16.5km), 1995–2024. 30 years of February data.