How hot does Washington DC get in May?

Daytime highs average around 77°F. Lean toward breathable fabrics like cotton and linen, and bring sun protection.

What to Pack for Washington DC in May — 2026 Packing List

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Linen is ideal for Washington DC in May as humidity begins to rise alongside the average daily high of 77F.
May in Washington DC brings highs of 77°F and 11 rainy days — breathable cotton or linen-blend pants keep you comfortable during long National Mall walks without trapping heat.
Flowy dresses are perfect for exploring the outdoor exhibits at the National Zoo in Washington DC when temps reach 77F.
With 11 rainy days, May is Washington DC's wettest month, making a breathable rain jacket an absolute necessity.

Supportive sandals are great for the 77F May weather in Washington DC, provided they can handle 5+ miles of walking.
Canvas shoes are breathable for May's warmth in Washington DC but should be treated with water-repellent spray for the 11 rainy days.
Polished loafers fit the Georgetown aesthetic and are comfortable for browsing the neighborhood's shops in 77F weather.

A hat provides much-needed shade on the exposed National Mall in Washington DC when May highs hit 77F.
Washington DC's open National Mall has no shade canopy and May highs reach 77°F — UV-blocking sunglasses protect your eyes on the 2-mile stretch between the Lincoln Memorial and the Capitol.
A waterproof case is a smart accessory for the 11 rainy days that typically hit Washington DC throughout May.

Since May is Washington DC's rainiest month with 11 days of precipitation, a large, sturdy umbrella is highly recommended.
May averages 11 rainy days in Washington DC — a quick-dry towel in your bag lets you wipe down a wet bench at the National Mall or dry off after an unexpected shower without ruining your afternoon.
May highs reach 77°F in Washington DC and the National Mall has few water fountains along its 2-mile stretch — an insulated bottle keeps water cool during long outdoor days.

May is the busiest month for student tours in Washington DC; expect large crowds at every major monument and museum.

Check out the 'Passport DC' events in May, where many embassies in Washington DC open their doors to the public for free tours.

Use the Metro to avoid Washington DC's notorious traffic, but carry your umbrella for the walk between the station and your destination.

Use the Metro to avoid Washington DC's notorious traffic, but carry your umbrella for the walk between the station and your destination.
Daytime highs average around 77°F. Lean toward breathable fabrics like cotton and linen, and bring sun protection.
Use the Metro to avoid Washington DC's notorious traffic, but carry your umbrella for the walk between the station and your destination.
May is the busiest month for student tours in Washington DC; expect large crowds at every major monument and museum.

Style Guide

Washington DC Summer 2026 Packing Guide

Pack smart for a stylish, weather-proof trip to Washington DC in summer