National Memorial of the United StatesWashington, District of Columbia

Washington Monument

District of Columbia Inventory of Historic SitesNational Register of Historic Places listed placeBuilt 1848

TypeNational Memorial of the United StatesEgyptian Revival

Built1848by Robert Mills, Thomas Lincoln Casey, Sr., United States Army Corps of Engineers

Best monthsApr · Sep–Octweather in Washington

38.89° N, 77.04° WUTC−4 · Eastern Daylight Time

Standing for178 years

built 1848today 2026

When to goWashington · weather score

Best timeApr · Sep–Oct

October: high / low69° / 48°

iAbout

Washington Monument in brief

Washington Monument is a national memorial of the united states in Washington, District of Columbia, United States.

It holds the designations District of Columbia Inventory of Historic Sites, National Register of Historic Places listed place and Historic Civil Engineering Landmark.

The national memorial of the united states dates from 1848, was designed by Robert Mills, Thomas Lincoln Casey, Sr., United States Army Corps of Engineers and is built in the Egyptian Revival style.

For a visit, the weather in Washington is best in April, September and October; in October afternoons average 69°.

Washington: weather and travel guide

Facts

Type: National Memorial of the United States
Designation: District of Columbia Inventory of Historic Sites
: National Register of Historic Places listed place
: Historic Civil Engineering Landmark
Built: 1848
Architect: Robert Mills, Thomas Lincoln Casey, Sr., United States Army Corps of Engineers
Style: Egyptian Revival
Nearest town: Washington
Region: District of Columbia
Coordinates: 38.88947, -77.03525