Carved from Maryland and Virginia land under the 1790 Residence Act and laid out by French-born engineer Pierre L'Enfant, Washington has served as the federal capital since Congress first convened here in 1800. The city sits on the Potomac River, and height restrictions keep its skyline low enough that the Capitol dome stays visible from almost anywhere downtown. The Smithsonian's museums along the National Mall are free to enter, an arrangement dating to industrialist James Smithson's 1826 bequest 'to the United States of America.' Boundary stones placed in 1791-92 by a survey team including Benjamin Banneker, a self-taught Black astronomer, still mark the original federal district.
Nights sit around 19°C and afternoons around 28°C, though some days reach 33°C.
Washington, D.C. has real seasons: summer afternoons sit around 31°C, winter ones around 10°C.
Some summer days reach 36°C, and some winter nights drop below freezing.
Rain is spread through the year: about 10 days in 30 in July, the wettest month, and 8 in February.
Air quality is worth watching: June averages an AQI of 67, while March clears to 49.
Days stretch to about 14.7 hours of light in June and shrink to 9.3 in December — something to weigh if you work to a fixed timezone.
For what you're after, the best months in Washington, D.C. are June – September. Expect fast internet (343 Mbps) and a high cost of living (about €3550 a month).
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