Water Temperature of Dead Run in McLean, VA

Current Water Temperature

63.7°F

Measurement Time: Wednesday, May 27, 2026, 6:15 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

73°F
Overcast
Overcast
76.9°F
81.4°F
90%
WNW 6 mph
7.1 mph
77.6°F
69.8°F
0 in
100%
9 mi
1015 mbar
3

Five Day Weather Forecast

Patchy rain nearby
Wed
H: 85°F
L: 68°F
Patchy rain nearby
Thu
H: 79°F
L: 60°F
Sunny
Fri
H: 76°F
L: 51°F
Sunny
Sat
H: 68°F
L: 55°F
Sunny
Sun
H: 75°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 5.65 μg/m3
PM10: 5.75 μg/m3
Carbon Monoxide: 158.85 μg/m3
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:05 PM
Sunset: 8:25 PM
Daylight: 14 hrs 38 mins
Moonrise: 5:15 PM
Moon Transit: 10:34 PM
Moonset: 3:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

11:28 AM - 1:58 PM
12:00 AM - 12:00 AM

Minor Periods

4:45 PM - 6:15 PM
2:52 AM - 4:22 AM

Action Rating: 2 out of 5

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

Effective: Wed May 27, 2026, 8:20 AM
Expires: Wed May 27, 2026, 8:30 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Wednesday, May 27, 2026

Weather Forecast

Patchy rain nearby
84.9°F
67.5°F
74.8°F
81%
0.04 in
82%
0%
8.9 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 7.75 μg/m3
PM10: 7.99 μg/m3
Carbon Monoxide: 183.65 μg/m3
Nitrogen Dioxide: 12.34 μg/m3
Sulphur Dioxide: 2.26 μg/m3
Ozone: 57.52 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:05 PM
Sunset: 8:25 PM
Daylight: 14 hrs 38 mins
Moonrise: 5:15 PM
Moon Transit: 10:34 PM
Moonset: 3:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

11:28 AM - 1:58 PM
12:00 AM - 12:00 AM

Minor Periods

4:45 PM - 6:15 PM
2:52 AM - 4:22 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Patchy rain nearby
78.8°F
59.5°F
69.5°F
68%
0.01 in
83%
0%
12.1 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 9.11 μg/m3
PM10: 9.45 μg/m3
Carbon Monoxide: 170.21 μg/m3
Nitrogen Dioxide: 13.1 μg/m3
Sulphur Dioxide: 2.46 μg/m3
Ozone: 60.24 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:06 PM
Sunset: 8:26 PM
Daylight: 14 hrs 39 mins
Moonrise: 6:17 PM
Moon Transit: 11:19 PM
Moonset: 3:47 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

12:12 AM - 2:42 PM
12:00 AM - 12:00 AM

Minor Periods

5:47 PM - 7:17 PM
3:17 AM - 4:47 AM

Action Rating: 2 out of 5

Friday, May 29, 2026

Weather Forecast

Sunny
76.4°F
51.1°F
64°F
57%
0 in
0%
0%
6.3 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 6.95 μg/m3
PM10: 7.13 μg/m3
Carbon Monoxide: 165.46 μg/m3
Nitrogen Dioxide: 12.33 μg/m3
Sulphur Dioxide: 2.12 μg/m3
Ozone: 59.92 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:06 PM
Sunset: 8:27 PM
Daylight: 14 hrs 40 mins
Moonrise: 7:19 PM
Moon Transit: 12:00 AM
Moonset: 4:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:58 AM - 3:28 PM

Minor Periods

6:49 PM - 8:19 PM
3:45 AM - 5:15 AM

Action Rating: 3 out of 5

Saturday, May 30, 2026

Weather Forecast

Sunny
68.3°F
55.1°F
61.9°F
56%
0 in
0%
0%
12.8 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 7.32 μg/m3
PM10: 7.57 μg/m3
Carbon Monoxide: 197.66 μg/m3
Nitrogen Dioxide: 9.58 μg/m3
Sulphur Dioxide: 2.2 μg/m3
Ozone: 64.64 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:06 PM
Sunset: 8:27 PM
Daylight: 14 hrs 42 mins
Moonrise: 8:21 PM
Moon Transit: 12:06 AM
Moonset: 4:48 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:46 PM - 4:16 PM

Minor Periods

7:51 PM - 9:21 PM
4:18 AM - 5:48 AM

Action Rating: 4 out of 5

Sunday, May 31, 2026

Weather Forecast

Sunny
74.8°F
48°F
61.9°F
53%
0 in
0%
0%
7.8 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 3.13 μg/m3
PM10: 3.16 μg/m3
Carbon Monoxide: 146.7 μg/m3
Nitrogen Dioxide: 6.91 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 60.46 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:06 PM
Sunset: 8:28 PM
Daylight: 14 hrs 43 mins
Moonrise: 9:18 PM
Moon Transit: 12:55 AM
Moonset: 5:27 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:25 AM - 2:55 AM
2:36 PM - 5:06 PM

Minor Periods

8:48 PM - 10:18 PM
4:57 AM - 6:27 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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