UV Index for National Harbor, MD

Current National Harbor UV Index

1.1 (Low)

Last Updated 19 minutes ago

Hourly National Harbor UV Index

The hourly National Harbor, MD UV Index forecast for Saturday, September 27th, 2025.

5 Day Hourly National Harbor UV Index Forecast

Last Updated 20 hours ago

The UV index forecast for the next five days in National Harbor, MD has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in National Harbor over the next five days will be 5.8 on Sunday, September 28th at 1:00 pm.

The UV index forecast for Saturday, September 27th in National Harbor, MD is below.

Time UV Index Risk
11am 2.6
Low
12pm 4.2
Moderate
1pm 1.7
Low
2pm 1.8
Low
3pm 3
Moderate
4pm 0.4
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, September 28th in National Harbor, MD is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.2
Low
9am 0.7
Low
10am 2
Low
11am 3.7
Moderate
12pm 5.2
Moderate
1pm 5.8
Moderate
2pm 5.6
Moderate
3pm 4.3
Moderate
4pm 2.7
Low
5pm 1.2
Low
6pm 0.3
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, September 29th in National Harbor, MD is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.2
Low
9am 0.8
Low
10am 2
Low
11am 3.4
Moderate
12pm 4.6
Moderate
1pm 5.1
Moderate
2pm 4.5
Moderate
3pm 4.1
Moderate
4pm 2.3
Low
5pm 0.7
Low
6pm 0.2
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, September 30th in National Harbor, MD is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.1
Low