Rockville Weather in December

Rockville in December sees low daytime temperatures of 9°C (48°F) and nighttime lows of -1°C (30°F). Rainfall is fairly high this month at around 103 mm (4.1 in), so pack a rain jacket to stay dry.

Rainfall in Rockville in December

Historically, approximately 11 days this month are expected to have snow/rain, averaging 103 mm (4.1 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Rockville in December

In December, Rockville sees low temperatures, with highs of 9°C (48°F). Nights drop to around -1°C (30°F). During December, the winter season is in full swing. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With overnight lows of -1°C (30°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold.

Sunshine in Rockville in December

The area experiences a moderate amount of sunshine, with approximately 130 hours of sunlight expected. This means a decent mix of sun and overcast.

If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Rockville. Our weather planner can help you explore destinations with more pleasant weather conditions.