Water Temperature of Dead Run in McLean, VA

Current Water Temperature

75.7°F

Measurement Time: Thursday, June 11, 2026, 11:15 AM EDT

Temperature Locations

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Local Points of Interest

Dead Run; Langley Oaks Park

Dead Run

Station Name: DEAD RUN AT WHANN AVENUE NEAR MCLEAN, VA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 226 feet

Nearest Address:
800 Whann Ave
McLean, VA 22101
Fairfax County

GPS Coordinates: 38.95977716, -77.1756743

Nearby Water Temperatures

Difficult Run, McLean, VA (3.9 mi)
Sligo Creek, Takoma Park, MD (9.4 mi)
Difficult Run, Oakton, VA (9.9 mi)
Washington Channel, Washington, DC (10.2 mi)
Paint Branch, Calverton, MD (12.4 mi)
Northeast Branch Anacostia River, Riverdale Park, MD (13.4 mi)
Patuxent River, Brighton, MD (18.5 mi)
Potomac River, Point of Rocks, MD (29.3 mi)
Carroll Creek, Frederick, MD (34.9 mi)
Scotts Level Branch, Milford Mill, MD (35.5 mi)
Carroll Creek, Frederick, MD (35.8 mi)
Severn River, Annapolis, MD (37.5 mi)
Northwest Harbor, Baltimore, MD (38.4 mi)
Chesapeake Bay, Annapolis, MD (39.1 mi)
Herring Run, Baltimore, MD (41.5 mi)

Weather for McLean, Virginia

Current Weather

95.2°F
Partly cloudy
Partly cloudy
99.9°F
105.4°F
46%
W 5.8 mph
6.7 mph
97.8°F
68.4°F
0 in
75%
9 mi
1010 mbar
7.6

Five Day Weather Forecast

Sunny
Thu
H: 101°F
L: 73°F
Patchy rain nearby
Fri
H: 94°F
L: 70°F
Sunny
Sat
H: 84°F
L: 63°F
Patchy rain nearby
Sun
H: 88°F
L: 66°F
Sunny
Mon
H: 80°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 7.1 μg/m3
PM10: 8.3 μg/m3
Carbon Monoxide: 129 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 111 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:08 PM
Sunset: 8:35 PM
Daylight: 14 hrs 52 mins
Moonrise: 2:37 AM
Moon Transit: 9:37 AM
Moonset: 4:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:07 AM - 11:37 AM

Minor Periods

4:21 PM - 5:51 PM
2:07 AM - 3:37 AM

Action Rating: 2 out of 5

Heat Advisory issued June 11 at 10:29AM EDT until June 11 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu June 11, 2026, 10:29 AM
Expires: Thu June 11, 2026, 6:30 PM

* WHAT...Heat index values up to 105 expected. * WHERE...Areas near and east of the Interstate 95 corridor from northeast to southern Maryland and the northern neck of Virginia, including Baltimore MD and Washington DC. * WHEN...Until 8 PM EDT this evening. * 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. 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! In cases of heat stroke, call 9 1 1.


This is only a test for monitoring of vital dissemination systems.

Effective: Thu June 11, 2026, 2:28 PM
Expires: Thu June 11, 2026, 2:38 PM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Thursday, June 11, 2026

Weather Forecast

Sunny
101.1°F
72.9°F
86.2°F
60%
0 in
3%
0%
8.1 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 9.86 μg/m3
PM10: 10.52 μg/m3
Carbon Monoxide: 154.21 μg/m3
Nitrogen Dioxide: 12.41 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 68.79 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:08 PM
Sunset: 8:35 PM
Daylight: 14 hrs 52 mins
Moonrise: 2:37 AM
Moon Transit: 9:37 AM
Moonset: 4:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:07 AM - 11:37 AM

Minor Periods

4:21 PM - 5:51 PM
2:07 AM - 3:37 AM

Action Rating: 2 out of 5

Friday, June 12, 2026

Weather Forecast

Patchy rain nearby
94°F
69.5°F
80.6°F
71%
0.1 in
57%
0%
10.7 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 10.21 μg/m3
PM10: 11.02 μg/m3
Carbon Monoxide: 157.88 μg/m3
Nitrogen Dioxide: 12.03 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 68.79 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:08 PM
Sunset: 8:35 PM
Daylight: 14 hrs 53 mins
Moonrise: 3:09 AM
Moon Transit: 10:32 AM
Moonset: 6:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:02 AM - 12:32 AM

Minor Periods

5:39 PM - 7:09 PM
2:39 AM - 4:09 AM

Action Rating: 2 out of 5

Saturday, June 13, 2026

Weather Forecast

Sunny
84.4°F
62.7°F
74.2°F
58%
0 in
3%
0%
7.8 mph
9.8


Air Quality

AQI: 1 - Good
PM2.5: 7.58 μg/m3
PM10: 7.94 μg/m3
Carbon Monoxide: 138.79 μg/m3
Nitrogen Dioxide: 10.14 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 83 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:08 PM
Sunset: 8:36 PM
Daylight: 14 hrs 53 mins
Moonrise: 3:50 AM
Moon Transit: 11:34 AM
Moonset: 7:28 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
11:04 AM - 1:34 PM

Minor Periods

6:58 PM - 8:28 PM
3:20 AM - 4:50 AM

Action Rating: 3 out of 5

Sunday, June 14, 2026

Weather Forecast

Patchy rain nearby
87.8°F
66.2°F
75.5°F
69%
0.07 in
57%
0%
9.8 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 7.48 μg/m3
PM10: 7.98 μg/m3
Carbon Monoxide: 142.85 μg/m3
Nitrogen Dioxide: 7.35 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 94.33 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:09 PM
Sunset: 8:36 PM
Daylight: 14 hrs 54 mins
Moonrise: 4:42 AM
Moon Transit: 12:40 AM
Moonset: 8:43 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
12:10 AM - 2:40 PM

Minor Periods

8:13 PM - 9:43 PM
4:12 AM - 5:42 AM

Action Rating: 5 out of 5

Monday, June 15, 2026

Weather Forecast

Sunny
80°F
62.4°F
70.8°F
61%
0 in
5%
0%
10.3 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 4.47 μg/m3
PM10: 4.71 μg/m3
Carbon Monoxide: 165.11 μg/m3
Nitrogen Dioxide: 6.27 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 66.56 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:09 PM
Sunset: 8:36 PM
Daylight: 14 hrs 54 mins
Moonrise: 5:46 AM
Moon Transit: 1:48 PM
Moonset: 9:47 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:31 AM - 5:01 AM
1:18 PM - 3:48 PM

Minor Periods

9:17 PM - 10:47 PM
5:16 AM - 6:46 AM

Action Rating: 4 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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