National Harbor Weather in March

National Harbor in March sees moderate temperatures, with highs around 14°C (57°F) and overnight lows of 3°C (37°F). Rainfall is fairly high at around 75 mm (3 in) on average, so pack waterproofs just in case.

Rainfall in National Harbor in March

You can expect rain on roughly 10 days based on historical data, averaging 75 mm (3 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in National Harbor in March

Daytime highs in National Harbor in March reach 14°C (57°F), with nights around 3°C (37°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 3°C (37°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in National Harbor in March

With approximately 205 hours of sunshine, the days are filled with clear skies. Despite it being a cool month, it makes for pleasant days outside.

Wind Speed in National Harbor in March

March has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Should you favor a climate that's both dry and comfortably warm, April typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.