National Harbor (MD) Weather and Climate: A Comprehensive Guide
National Harbor experiences great temperature shifts.
The city's weather can transition from very warm days
to cold weather.
It is also known for its large amounts of rain/snowfall.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
The climate in National Harbor is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 32°C in July to a chilly 7°C in the coolest month, January.
Nights are cooler, with lows often dropping to around -2°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
National Harbor has a notably wet climate with abundant precipitation, recording 1151 mm of rain/snowfall per year. The climate in National Harbor shows significant variation throughout the year. Expect high rainfall in June, with an average of 149 mm of precipitation over 13 rainy days. In contrast, February offers drier and sunnier days, with around 67 mm of rainfall over 10 rainy days. For more details, please visit our National Harbor Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, National Harbor serves as an ideal destination. Expect longer, more sun-filled days in June with an average of 9.4 hours of sunshine daily, and embrace the darker days in December, offering only 4.3 hours of daily sunlight. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in National Harbor.
The city experiences its highest humidity in August, reaching 69%. In March, the humidity drops to its lowest level at 58%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed varies between 4 m/s and 5 m/s throughout the year. It is lowest in May, June, July, August, September, October, November and December and highest during January, February, March and April.
The mean monthly wind speed over the year (meters per second)
partly cloudy and no rain overcast and heavy rain broken clouds and rainForecast for National Harbor (MD)
2 m/s
3 m/s
7 m/s
The best time of year to visit National Harbor in the United States of America
During the months of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
July has an average maximum temperature of 32°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 7°C.
June tops the wettest month list with 149 mm of rainfall.
February is the driest month with 67 mm of precipitation.
June is the sunniest month with an average of 282 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
