Weather for McLean, Virginia
Current Weather
Humidity: 63%
Feels Like: 92.3°F
Wind: WNW 2.9 mph
Wind Gusts: 4.6 mph
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 5.7
Five Day Weather Forecast
Mon
H: 93°F
L: 77°F
Tue
H: 99°F
L: 71°F
Wed
H: 93°F
L: 74°F
Thu
H: 90°F
L: 76°F
Fri
H: 83°F
L: 70°F
Air Quality
Nitrogen Dioxide: 24.42 μg/m3
Sulphur Dioxide: 4.26 μg/m3
Ozone: 125 μg/m3
Astronomical
Sun Transit: 1:13 PM
Sunset: 8:37 PM
Daylight: 14 hrs 47 mins
Moon Transit: 10:53 PM
Moonset: 2:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.7%
Best Times for Fishing or Hunting
Major Periods
11:44 AM - 2:14 PM12:00 AM - 12:00 AM
Minor Periods
5:54 PM - 7:24 PM2:09 AM - 3:39 AM
Action Rating: 2 out of 5
This is only a test for monitoring of vital dissemination systems.
Effective: Mon July 7, 2025, 2:25 PM
Expires: Mon July 7, 2025, 2:35 PM
Monitoring message only. Please disregard.
Monitoring message only. Please disregard.
Heat Advisory issued July 7 at 12:31PM EDT until July 8 at 7:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Mon July 7, 2025, 12:31 PM
Expires: Mon July 7, 2025, 8:45 PM
* WHAT...Heat index values up to 105 expected, up to 107 degrees closer to the Chesapeake Bay. * WHERE...In Maryland, Anne Arundel, Prince Georges, Cecil, Southeast Harford, Southern Baltimore, Calvert, Charles, and St. Marys Counties. In Virginia, King George County. * WHEN...From 1 PM to 7 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat Advisory issued July 7 at 12:31PM EDT until July 8 at 7:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Mon July 7, 2025, 12:31 PM
Expires: Mon July 7, 2025, 8:45 PM
* WHAT...Heat index values up to 105 expected, up to 107 degrees closer to the Chesapeake Bay. * WHERE...In Maryland, Anne Arundel, Prince Georges, Cecil, Southeast Harford, Southern Baltimore, Calvert, Charles, and St. Marys Counties. In Virginia, King George County. * WHEN...From 1 PM to 7 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat Advisory issued July 7 at 12:31PM EDT until July 8 at 7:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Mon July 7, 2025, 12:31 PM
Expires: Mon July 7, 2025, 8:45 PM
* WHAT...Heat index values up to 105 expected, up to 107 degrees closer to the Chesapeake Bay. * WHERE...In Maryland, Anne Arundel, Prince Georges, Cecil, Southeast Harford, Southern Baltimore, Calvert, Charles, and St. Marys Counties. In Virginia, King George County. * WHEN...From 1 PM to 7 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat Advisory issued July 7 at 12:31PM EDT until July 8 at 7:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Mon July 7, 2025, 12:31 PM
Expires: Mon July 7, 2025, 8:45 PM
* WHAT...Heat index values up to 105 expected, up to 107 degrees closer to the Chesapeake Bay. * WHERE...In Maryland, Anne Arundel, Prince Georges, Cecil, Southeast Harford, Southern Baltimore, Calvert, Charles, and St. Marys Counties. In Virginia, King George County. * WHEN...From 1 PM to 7 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Weather Forecast
Average Temperature: 84.2°F
Average Humidity: 73%
Wind: 4.5 mph
UV Index: 1.7
Air Quality
Nitrogen Dioxide: 15.53 μg/m3
Sulphur Dioxide: 4.84 μg/m3
Ozone: 84.76 μg/m3
Astronomical
Sun Transit: 1:13 PM
Sunset: 8:37 PM
Daylight: 14 hrs 47 mins
Moon Transit: 10:53 PM
Moonset: 2:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.7%
Best Times for Fishing or Hunting
Major Periods
11:44 AM - 2:14 PM12:00 AM - 12:00 AM
Minor Periods
5:54 PM - 7:24 PM2:09 AM - 3:39 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 84.8°F
Average Humidity: 76%
Wind: 17.7 mph
UV Index: 2.6
Air Quality
Nitrogen Dioxide: 17.42 μg/m3
Sulphur Dioxide: 8.94 μg/m3
Ozone: 115.28 μg/m3
Astronomical
Sun Transit: 1:13 PM
Sunset: 8:37 PM
Daylight: 14 hrs 46 mins
Moon Transit: 11:47 PM
Moonset: 3:21 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.8%
Best Times for Fishing or Hunting
Major Periods
12:36 AM - 3:06 PM12:00 AM - 12:00 AM
Minor Periods
6:52 PM - 8:22 PM2:51 AM - 4:21 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 81.3°F
Average Humidity: 79%
Wind: 8.5 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 29.65 μg/m3
Sulphur Dioxide: 10.74 μg/m3
Ozone: 117.92 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:36 PM
Daylight: 14 hrs 45 mins
Moon Transit: 12:00 AM
Moonset: 4:12 AM
Moon Phase: Full
Moon Illumination: 99.6%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM1:31 PM - 4:01 PM
Minor Periods
7:45 PM - 9:15 PM3:42 AM - 5:12 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 81.4°F
Average Humidity: 77%
Wind: 4.3 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 54.06 μg/m3
Sulphur Dioxide: 8.77 μg/m3
Ozone: 82.77 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:36 PM
Daylight: 14 hrs 44 mins
Moon Transit: 12:41 AM
Moonset: 5:11 AM
Moon Phase: Full
Moon Illumination: 99.8%
Best Times for Fishing or Hunting
Major Periods
12:11 AM - 2:41 AM2:25 PM - 4:55 PM
Minor Periods
8:30 PM - 10:00 PM4:41 AM - 6:11 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 76.4°F
Average Humidity: 84%
Wind: 7.4 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:36 PM
Daylight: 14 hrs 43 mins
Moon Transit: 1:36 AM
Moonset: 6:17 AM
Moon Phase: Full
Moon Illumination: 97.4%
Best Times for Fishing or Hunting
Major Periods
1:06 AM - 3:36 AM3:19 PM - 5:49 PM
Minor Periods
9:08 PM - 10:38 PM5:47 AM - 7:17 AM
Action Rating: 4 out of 5