The climate in National Harbor, MD is mild and temperate throughout the year. Summers are typically hot and humid with temperatures reaching up to 88F (31C) during the day and cooling off in the evening to around 70F (21C). Winters in the area are usually cold, but typically not extreme, with temperatures averaging around 33F (1C) during the day and dropping to around 20F (-7C) in the evening. The area also experiences a good amount of precipitation throughout the year, with summer months receiving more rainfall than winter months. Due to its location on the coast of Maryland, National Harbor can experience occasional bouts of strong winds or storms due to its proximity to water.
National Harbor, Maryland gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
National Harbor averages 14 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 203 sunny days per year in National Harbor. The US average is 205 sunny days.
National Harbor gets some kind of precipitation, on average, 117 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 88 degrees
Winter Low: the January low is 27
Rain: averages 43 inches of rain a year
Snow: averages 14 inches of snow a year