National Harbor Weather in January

National Harbor in January averages 7°C (45°F) during the day and -2°C (28°F) at night. This is part of the winter season, and quite a bit of snow/rainfall is expected this month.

Rainfall in National Harbor in January

Historically, January sees about 10 days of snow/rain, with a monthly average of 68 mm (2.7 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in National Harbor in January

Daytime highs in National Harbor in January reach 7°C (45°F), with nights around -2°C (28°F). January is part of the winter season. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. Nights drop below freezing to -2°C (28°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. It's generally the coldest month of the year, making it essential to pack warm layers and winter accessories.

Sunshine in National Harbor in January

The month experiences a moderate amount of sunlight, with 144 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in National Harbor in January

Average wind conditions reach 5 m/s (10 knots) in January. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

January in National Harbor has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our National Harbor's climate page.

National Harbor Temperature in January

Min Temperature -2°C (28°F)  

Max Temperature 7°C (45°F)  

Chance of Rain 34%  

Precipitation 68 mm (2.7 in)  

Rainy days 10 days  

Humidity 62% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 144 hours *  

Percentage Sunshine 48% *  

* Data from: Washington DC, the United States of America (7 KM, 4 Miles).

What to Wear in National Harbor in January

Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in National Harbor in January

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

4/10

Walking

4/10

Camping

1/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our National Harbor's climate page.

More climate data for National Harbor

Temperature Rainfall Sunshine Humidity Wind Speed

See the full National Harbor climate overview or explore weather in the United States of America.