National Harbor weather in September (Maryland, United States of America)
Planning a trip to National Harbor in September? Wondering if it's the right time to visit? Browse this page for a comprehensive overview of the weather conditions for that month.
In September, National Harbor generally has high temperatures and high rainfall. Throughout the day, temperatures typically settle at around 27°C. But by evening, they drop to around 17°C.
National Harbor in September usually receives high rainfall, averaging around 101 mm for the month. When we look at the climate data from the last 30 years, we can expect around 9 days of rain.
The city usually sees around 225 hours of sunlight, indicating many sunny days.
Should you favor a climate that's both dry and comfortably warm April typically offers the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.
For an in-depth look at the yearly conditions, visit our specialized National Harbor climate page with graphs.
National Harbor, monthly averages in September
Min Temperature
17°C
Max Temperature
27°C
Chance of Rain
29%
Precipitation
101 mm
Rainy days
9 days
Humidity
68% *
Windspeed
14 km/h *
Sunshine
225 hours *
Percentage Sunshine
60% *
Where to go in the United States of America in September
Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in National Harbor in September?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
This site provides you with all the information you need about the climate in National Harbor.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
