Skip to content
Washington DC in December

Washington DC Weather in December

🇺🇸 United States

8°C
High
0°C
Low
9
Rain Days
6h
Sunshine
65%
Humidity

North America › 🇺🇸 United States › Washington DC

Updated: March 2026

Is December a Good Time to Visit Washington DC?

3/10
Avoid

December is a avoid time to visit Washington DC (3/10). Average highs of 8°C and 6 sunshine hours daily make conditions workable, though not exceptional. December suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 9 potential rain days. January offers a similar profile at lower hotel rates if dates are flexible. The 8°C highs require proper cold-weather clothing; many visitors underestimate how far the wind chill drops the perceived temperature, particularly near water or at elevated viewpoints. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.

vs November:13°C avg high

Washington DC in December rewards travelers with average highs of 8°C and overnight lows around 0°C. Expect around 9 rainy days, so a compact umbrella is worth carrying. With 6 daily sunshine hours on average, conditions are cool and bracing, well suited for active days on foot.

8°C

Avg High

0°C

Avg Low

9 days

Rain Days

6h

Sunshine

65%

Humidity

Temperature in Washington DC in December

The 8°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. The UV index of 1 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Wind averages 17 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 46°F average high, 32°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in December

Monthly Precipitation (mm)

What to Wear in Washington DC in December

Morning0°CBefore the day warms up
Afternoon8°CPeak daytime temperature
Evening3°CAfter sunset cools down

Packing for Washington DC in December means dressing for 8°C days and 0°C evenings. Layering is key: a thermal base, mid-layer fleece, and a windproof outer jacket for 8°C highs that feel colder in the wind. Evening temperatures settle at 0°C, a modest 8°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 9 potential rainy days.

💡

Local tip: Washington DC's 8°C days warm significantly in direct sunshine. A removable outer layer you can tie around your waist handles the midday warmth without leaving you cold on shaded streets or in the evening.

Events in Washington DC in December

December has no major festivals or public holidays in Washington DC, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Washington DC in December

Based on 8°C average highs and 9 rainy days

  • Warm jacket (down or fleece)
  • Merino wool base layer (regulates temperature and resists odour)
  • Sweaters and lined trousers
  • Scarf and lightweight gloves
  • Compact folding umbrella
  • Waterproof outer layer or packable rain jacket
  • Quick-dry clothing that recovers fast after a shower
  • Comfortable walking shoes (a second pair lets the first air out overnight)
  • Universal travel adapter
  • Small day pack for city exploration
  • Reusable water bottle

Best Activities in Washington DC in December

  • Vigorous walking tour of the UNESCO heritage districtMidday (12-2pm)The 8°C peak temperature provides ideal conditions for brisk sightseeing walks
  • Cycling the riverside or park circuitAfternoon (1-4pm)Cool dry air makes long cycling sessions comfortable without overheating
  • Explore hilltop viewpoints and fortressesMorning for clear viewsCold-weather atmospheric clarity gives the longest sightlines of the year
  • Open-air Christmas or seasonal marketsAfternoon into eveningCool temperatures make festive outdoor markets genuinely atmospheric
  • Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
  • Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
  • Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
  • Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningDecember brings distinct seasonal changes to public green spaces worth exploring
  • Warm up with traditional hot dishes: local stew, fondue, or braised specialities at a neighbourhood restaurantLunch (12-2pm) or dinner (7-9pm)Cold-weather cuisine is a genuine cultural experience and the best local restaurants serve their heartiest dishes in cooler months

Why is Washington DC cool in December?

December in Washington DC reflects a mid-latitude climate pattern, with temperatures averaging 8°C by day and 0°C overnight. The city sits at 39 degrees north latitude, where the balance between solar radiation and heat loss drives conditions that are neither extreme nor static. Cold conditions reflect the dominance of polar or continental air masses, which bring dry, stable weather with low humidity. Day-to-night temperature variation of 8°C is moderate and manageable with a single mid-layer. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Washington DC in December

In December, Washington DC experiences average highs of 8°C (46°F) and lows of 0°C (32°F). Expect around 9 rainy days and 6 hours of sunshine per day, with humidity averaging 65%. The 8°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an extra jacket is essential for evenings. UV exposure is moderate at index 1.
Washington DC typically sees 9 rainy days in December, with total precipitation of around 91mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Washington DC typically sees 4-6 fewer rain days than December.
Pack a heavy winter coat, thermal underlayers, waterproof insulated boots, and accessories including hats, gloves, and a scarf for Washington DC in December. Temperatures regularly fall to 0°C and rarely climb above 8°C during the day. Layering is the key strategy: a base layer, mid-layer insulation, and a windproof outer shell provide flexibility as you move between heated indoor spaces and cold outdoor streets.
December is a reasonable time to visit Washington DC. Expect 9 rainy days, so pack a light rain layer for flexibility. Average temperatures of 8°C make outdoor exploration comfortable during the dry periods. With 6 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.
The average high temperature in Washington DC in December is 8°C (46°F), and the average low is 0°C (32°F). The mean daily temperature is approximately 4°C (39°F). The day-to-night range of 8°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Washington DC is generally August. August offers the most sunshine at 11 hours per day and only 11 rainy days. Average temperatures reach 30°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around August gives you the best chance of dry, bright weather.
December is shoulder or low season in Washington DC, meaning fewer tourists and generally lower prices than peak months. With 6 sunshine hours and 9 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In December, Washington DC suits a range of activities thanks to cold temperatures of 8°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. Cosy cafes and cultural venues make ideal retreats on overcast days.

December ranks 12th sunniest of the year in Washington DC, with an average 6 daily sunshine hours. The driest months are October, November, and January. July is the hottest month (31°C avg high); January is the coolest (6°C). From here, temperatures fall 2°C into January. Compared to last month (November: 13°C high, 8 rain days), December is cooler and wetter. December is one of the least sunny months, but that often means lower prices and fewer fellow tourists.

Year-Round Climate

MonthHighLowRain DaysSunDetails
January6°C-2°C96hView
February8°C-1°C97hView
March13°C2°C108hView
April19°C8°C109hView
May24°C13°C1210hView
June29°C18°C1211hView
July31°C21°C1311hView
August30°C20°C1111hView
September26°C17°C109hView
October20°C11°C88hView
November13°C5°C87hView
December8°C0°C96hView

Other Months in Washington DC

JanFebMarAprMayJunJulAugSepOctNovDec

Plan Your Trip to Washington DC

Best Time to Visit Washington DCWashington DC vs New York in December

Data Sources for Washington DC

Washington DC on WikipediaOpen-Meteo Climate APINOAA National CentersUK Met OfficeWMOGeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.