Water Temperature of Dead Run in McLean, VA

Current Water Temperature

71.6°F

Measurement Time: Thursday, July 23, 2026, 6:15 PM 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

73.9°F
Partly cloudy
Partly cloudy
76.4°F
75.7°F
50%
E 3.4 mph
7 mph
71.8°F
49.2°F
0 in
50%
8 mi
1021 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 87°F
L: 64°F
Sunny
Fri
H: 86°F
L: 64°F
Partly Cloudy
Sat
H: 80°F
L: 66°F
Partly Cloudy
Sun
H: 86°F
L: 64°F
Sunny
Mon
H: 89°F
L: 65°F

Air Quality

AQI: 1 - Good
PM2.5: 11.7 μg/m3
PM10: 11.8 μg/m3
Carbon Monoxide: 299 μg/m3
Nitrogen Dioxide: 26.2 μg/m3
Sulphur Dioxide: 2.4 μg/m3
Ozone: 68 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:15 PM
Sunset: 8:28 PM
Daylight: 14 hrs 26 mins
Moonrise: 4:06 PM
Moon Transit: 8:47 PM
Moonset: 12:49 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

9:39 AM - 12:09 AM
8:17 PM - 10:47 PM

Minor Periods

3:36 PM - 5:06 PM
12:19 AM - 1:49 AM

Action Rating: 3 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
87.3°F
63.9°F
74.7°F
51%
0 in
2%
0%
8.7 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 12.43 μg/m3
PM10: 13 μg/m3
Carbon Monoxide: 146.96 μg/m3
Nitrogen Dioxide: 5.35 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 95.96 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:15 PM
Sunset: 8:28 PM
Daylight: 14 hrs 26 mins
Moonrise: 4:06 PM
Moon Transit: 8:47 PM
Moonset: 12:49 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

9:39 AM - 12:09 AM
8:17 PM - 10:47 PM

Minor Periods

3:36 PM - 5:06 PM
12:19 AM - 1:49 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
86.2°F
63.7°F
74.2°F
56%
0 in
3%
0%
7.8 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 10.73 μg/m3
PM10: 11.95 μg/m3
Carbon Monoxide: 191.21 μg/m3
Nitrogen Dioxide: 13.7 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 92.58 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:15 PM
Sunset: 8:28 PM
Daylight: 14 hrs 25 mins
Moonrise: 5:06 PM
Moon Transit: 9:37 PM
Moonset: 1:24 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

10:28 AM - 12:58 AM
9:07 PM - 11:37 PM

Minor Periods

4:36 PM - 6:06 PM
12:54 AM - 2:24 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Partly Cloudy
80°F
65.7°F
71.4°F
63%
0.01 in
17%
0%
4.9 mph
9.4


Air Quality

AQI: 1 - Good
PM2.5: 12.35 μg/m3
PM10: 15.43 μg/m3
Carbon Monoxide: 132.04 μg/m3
Nitrogen Dioxide: 8.5 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 89.38 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:15 PM
Sunset: 8:27 PM
Daylight: 14 hrs 23 mins
Moonrise: 6:02 PM
Moon Transit: 10:28 PM
Moonset: 2:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

11:18 AM - 1:48 PM
12:00 AM - 12:00 AM

Minor Periods

5:32 PM - 7:02 PM
1:36 AM - 3:06 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Partly Cloudy
86°F
63.8°F
74.4°F
57%
0.03 in
36%
0%
6.3 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 12.16 μg/m3
PM10: 14.28 μg/m3
Carbon Monoxide: 130.88 μg/m3
Nitrogen Dioxide: 9.15 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 99.04 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:15 PM
Sunset: 8:26 PM
Daylight: 14 hrs 21 mins
Moonrise: 6:52 PM
Moon Transit: 11:19 PM
Moonset: 2:55 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

12:10 AM - 2:40 PM
12:00 AM - 12:00 AM

Minor Periods

6:22 PM - 7:52 PM
2:25 AM - 3:55 AM

Action Rating: 2 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
89.3°F
64.8°F
74.7°F
71%
0.03 in
43%
0%
9.2 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 13.34 μg/m3
PM10: 13.99 μg/m3
Carbon Monoxide: 150.64 μg/m3
Nitrogen Dioxide: 7.57 μg/m3
Sulphur Dioxide: 2.23 μg/m3
Ozone: 101.25 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 20 mins
Moonrise: 7:34 PM
Moon Transit: 12:00 AM
Moonset: 3:50 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:01 PM - 3:31 PM

Minor Periods

7:04 PM - 8:34 PM
3:20 AM - 4:50 AM

Action Rating: 3 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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