Weather for McLean, Virginia
Current Weather
Five Day Weather Forecast
Tue
H: 98°F
L: 65°F
Wed
H: 101°F
L: 75°F
Thu
H: 97°F
L: 77°F
Fri
H: 88°F
L: 71°F
Sat
H: 86°F
L: 71°F
Air Quality
Nitrogen Dioxide: 8.7 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 100 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:34 PM
Daylight: 14 hrs 40 mins
Moon Transit: 1:36 PM
Moonset: 9:11 PM
Moon Phase: New
Moon Illumination: 1.9%
Best Times for Fishing or Hunting
Major Periods
2:22 AM - 4:52 AM1:06 PM - 3:36 PM
Minor Periods
8:41 PM - 10:11 PM5:20 AM - 6:50 AM
Action Rating: 4 out of 5
Heat Advisory issued July 14 at 12:04PM EDT until July 15 at 4:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Tue July 14, 2026, 12:04 PM
Expires: Tue July 14, 2026, 8:15 PM
* WHAT...Heat index values up to 106 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...From 11 AM to 4 PM EDT Wednesday. * 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.
Heat Advisory issued July 14 at 12:55PM EDT until July 15 at 8:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Tue July 14, 2026, 12:55 PM
Expires: Tue July 14, 2026, 9:00 PM
* WHAT...Heat index values up to 105 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...From 11 AM to 8 PM EDT Wednesday. * 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.
Heat Advisory issued July 14 at 6:45PM EDT until July 15 at 8:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Tue July 14, 2026, 6:45 PM
Expires: Wed July 15, 2026, 2:45 AM
* WHAT...Heat index values up to 105 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...From 11 AM to 8 PM EDT Wednesday. * 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.
Air Quality Alert issued July 14 at 4:40PM EDT by NWS Baltimore MD/Washington DC
Effective: Tue July 14, 2026, 4:40 PM
Expires: Thu July 16, 2026, 12:00 AM
The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Wednesday for the Maryland suburban DC region. A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx
Heat Advisory issued July 14 at 12:04PM EDT until July 15 at 4:00PM EDT by NWS Baltimore MD/Washington DC
Effective: Tue July 14, 2026, 12:04 PM
Expires: Tue July 14, 2026, 8:15 PM
* WHAT...Heat index values up to 103 expected. * WHERE...Portions of north central and western Maryland, northwest and western Virginia, and eastern and panhandle West Virginia. * WHEN...From 11 AM to 4 PM EDT Wednesday. * 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.
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.53 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 91.67 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:34 PM
Daylight: 14 hrs 40 mins
Moon Transit: 1:36 PM
Moonset: 9:11 PM
Moon Phase: New
Moon Illumination: 1.9%
Best Times for Fishing or Hunting
Major Periods
2:22 AM - 4:52 AM1:06 PM - 3:36 PM
Minor Periods
8:41 PM - 10:11 PM5:20 AM - 6:50 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.56 μg/m3
Sulphur Dioxide: 2.02 μg/m3
Ozone: 106.79 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:34 PM
Daylight: 14 hrs 38 mins
Moon Transit: 2:35 PM
Moonset: 9:47 PM
Moon Phase: New
Moon Illumination: 0.2%
Best Times for Fishing or Hunting
Major Periods
3:23 AM - 5:53 AM2:05 PM - 4:35 PM
Minor Periods
9:17 PM - 10:47 PM6:39 AM - 8:09 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 8.71 μg/m3
Sulphur Dioxide: 2.86 μg/m3
Ozone: 106 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:33 PM
Daylight: 14 hrs 37 mins
Moon Transit: 3:28 PM
Moonset: 10:17 PM
Moon Phase: New
Moon Illumination: 2.4%
Best Times for Fishing or Hunting
Major Periods
4:18 AM - 6:48 AM2:58 PM - 5:28 PM
Minor Periods
9:47 PM - 11:17 PM7:57 AM - 9:27 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.76 μg/m3
Sulphur Dioxide: 1.66 μg/m3
Ozone: 117.17 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:33 PM
Daylight: 14 hrs 36 mins
Moon Transit: 4:16 PM
Moonset: 10:43 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%
Best Times for Fishing or Hunting
Major Periods
5:09 AM - 7:39 AM3:46 PM - 6:16 PM
Minor Periods
10:13 PM - 11:43 PM9:09 AM - 10:39 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.86 μg/m3
Sulphur Dioxide: 1.92 μg/m3
Ozone: 91 μg/m3
Astronomical
Sun Transit: 1:15 PM
Sunset: 8:32 PM
Daylight: 14 hrs 34 mins
Moon Transit: 5:02 PM
Moonset: 11:06 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%
Best Times for Fishing or Hunting
Major Periods
5:55 AM - 8:25 AM4:32 PM - 7:02 PM
Minor Periods
12:00 AM - 12:00 AM10:18 AM - 11:48 AM
Action Rating: 3 out of 5