What to Wear in Washington DC
USA · 6 monthly packing guides
Washington DC runs preppy-political — among American cities still rewarding a blazer at lunch and a button-down at dinner, particularly in Georgetown, Capitol Hill, and Dupont Circle. The tailoring has presidential provenance: Brooks Brothers, founded in New York in 1818, gave Abraham Lincoln a great coat with an embroidered lining for his second inauguration in 1865, and from 1946 the company belonged to Washington's own Julius Garfinckel and Company. Summer (June-August) brings 30-32°C / 86-90°F humid afternoons, so pack a cardigan for air-conditioned museums. Memorial Day weekend, Capital Pride and Independence Day on July 4 shape the summer calendar, and the Senate keeps Seersucker Thursday on a warm Thursday in the second or third week of June, a tradition Senator Trent Lott revived in the late 1990s. Winter turns outdoor: the National Christmas Tree lighting on the Ellipse dates to Christmas Eve 1923, when Calvin Coolidge lit the first one, and January, the coldest month, brings 4.9 inches of snow in a normal year.
Choose your month below to match your layers and shoes to the weather. Across the months covered, average daily lows reach -1°C / 30°F in January; average highs reach 32°C / 90°F in July.
Compare Washington DC by month
Monthly averages help compare packing needs; check the forecast before departure. Only months with published guides are listed. See the source notes below for station and measurement differences. Scroll across the table to see all weather details on a small screen.
| Month | Average low | Average high | Rain days | Daylight |
|---|---|---|---|---|
| January packing guide | -1°C / 30°F | 7°C / 45°F | 10 | 9h 44m |
| May packing guide | 15°C / 59°F | 25°C / 77°F | 11 | 14h 25m |
| June packing guide | 20°C / 68°F | 30°C / 86°F | 10 | 14h 50m |
| July packing guide | 22°C / 72°F | 32°C / 90°F | 10 | 14h 35m |
| August packing guide | 21°C / 70°F | 31°C / 88°F | 10 | 13h 30m |
| December packing guide | 1°C / 34°F | 9°C / 48°F | 10 | 9h 28m |
Choose your Washington DC packing list
Washington in January: 7°C / 45°F days, −1°C / 30°F nights, 4.9 inches of snow, and Martin Luther King Jr. Day on Monday 18 January.
In this capsule: Olive insulated coat, knee length, hooded; Oatmeal fleece crew; Brown wool trousers, full length.
Washington DC in May: 25°C / 77°F afternoons, 15°C / 59°F mornings, 11 rain days — late spring, Smithsonian Folklife Festival end of month, Memorial Day.
In this capsule: Lightweight cotton tees (3+, white + neutrals); Fine-knit cardigan or light blazer; Dark straight-leg jeans + chino trousers.
Washington DC in June: 30°C / 86°F afternoons, 20°C / 68°F mornings, 10 rain days — humid summer begins, Capital Pride mid-month.
In this capsule: Lightweight cotton-blend tees (3+); Fine-knit cardigan (cream, navy, charcoal); Chino trousers or seersucker pants.
Washington DC in July: 32°C / 90°F afternoons, 22°C / 72°F mornings, 65% humidity, 10 rain days — peak humid summer, July 4 fireworks.
In this capsule: Cotton-blend tees (3+); Fine-knit cardigan (cream, navy, charcoal); Chino trousers + seersucker option.
Washington DC in August: light clothes for outdoor walking and a removable layer for the next museum stop.
In this capsule: Cotton-blend tees (3+); Fine-knit cardigan; Chino trousers + seersucker option.
Washington in December: 9°C / 48°F days, 1°C / 34°F nights, a tree lit on the Ellipse on 3 December, and open lawn between warm museums.
In this capsule: Charcoal wool coat, below the knee; Ivory fine merino crew; Emerald wool crew.
Climate sources by month
These credits follow the source recorded on each monthly guide. Climate figures inform the packing advice; outfit combinations and illustrations are editorial suggestions.
- January: NOAA NCEI · Reagan National Airport (DCA) · 1991–2020 normalsNOAA NCEI U.S. Climate Normals for USW00013743. Precipitation days count 0.01 in (0.25 mm) or more.
- May: NOAA · Reagan National Airport (DCA) · 1991–2020 normals
- June: NOAA · Reagan National Airport (DCA) · 1991–2020 normals
- July: NOAA · Reagan National Airport (DCA) · 1991–2020 normals
- August: NOAA · Reagan National Airport (DCA) · 1991–2020 normals
- December: NOAA NCEI · Reagan National Airport (DCA) · 1991–2020 normalsNOAA NCEI U.S. Climate Normals for USW00013743. Precipitation days count 0.01 in (0.25 mm) or more.
Frequently asked questions
Start with your travel month. The 6 published guides cover January, May, June, July, August, December. Compare the average low as well as the high: among these months, January has the lowest average low at -1°C / 30°F, while July has the highest average high at 32°C / 90°F. For a trip spanning two months, read both lists before deciding which layers to bring.
No. They are monthly climate averages for planning, not temperatures promised for a particular day or hour. Check the local forecast close to departure and adjust your layers and rain protection. The source, station and averaging period are listed for each month where recorded; different stations or rain-day definitions can affect comparisons.
No. Treat the capsule as a set of clothing functions: walking shoes, a base outfit, weather protection and any change for dinner or a venue's dress code. Start with equivalents you own. Adjust quantities to your trip length and laundry access; the illustrations are outfit suggestions, not a shopping requirement.