Rockville Weather in May

In Rockville, May brings high daytime temperatures around 24°C (75°F), with nights cooling to 13°C (55°F). Expect quite a bit of rainfall this month.

Rainfall in Rockville in May

On average, there are about 13 days with rain during this month, averaging 120 mm (4.7 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Rockville in May

Rockville in May gets highs of 24°C (75°F) during the day and drops to 13°C (55°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights drop to around 13°C (55°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Rockville in May

There are approximately 259 hours of sunshine this month, resulting in mostly clear days.

For Rockville itself, August generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.