Water Temperature of Dead Run in McLean, VA

Current Water Temperature

61.7°F

Measurement Time: Wednesday, May 6, 2026, 11:00 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

57.9°F
Light rain
Light rain
57.4°F
56.4°F
87%
N 5.1 mph
7.7 mph
55.1°F
50.6°F
0.03 in
100%
9 mi
1010 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 64°F
L: 52°F
Sunny
Fri
H: 68°F
L: 43°F
Patchy rain nearby
Sat
H: 71°F
L: 52°F
Patchy rain nearby
Sun
H: 79°F
L: 53°F
Cloudy
Mon
H: 60°F
L: 50°F

Air Quality

PM2.5: 10.35 μg/m3
PM10: 11.05 μg/m3
Carbon Monoxide: 165.85 μg/m3
Nitrogen Dioxide: 12.75 μg/m3
Sulphur Dioxide: 5.65 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:05 PM
Sunset: 8:07 PM
Daylight: 14 hrs 3 mins
Moonrise: 12:58 AM
Moon Transit: 5:32 AM
Moonset: 10:11 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

5:02 AM - 7:32 AM
7:13 PM - 9:43 PM

Minor Periods

9:41 AM - 11:11 AM
12:28 AM - 1:58 AM

Action Rating: 2 out of 5

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

Effective: Thu May 7, 2026, 2:27 AM
Expires: Thu May 7, 2026, 2:37 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Thursday, May 7, 2026

Weather Forecast

Patchy rain nearby
64°F
52.3°F
57.7°F
62%
0.05 in
81%
0%
7.6 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 12.74 μg/m3
PM10: 13.65 μg/m3
Carbon Monoxide: 188.29 μg/m3
Nitrogen Dioxide: 14.34 μg/m3
Sulphur Dioxide: 5.15 μg/m3
Ozone: 72.72 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:05 PM
Sunset: 8:07 PM
Daylight: 14 hrs 3 mins
Moonrise: 12:58 AM
Moon Transit: 5:32 AM
Moonset: 10:11 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

5:02 AM - 7:32 AM
7:13 PM - 9:43 PM

Minor Periods

9:41 AM - 11:11 AM
12:28 AM - 1:58 AM

Action Rating: 2 out of 5

Friday, May 8, 2026

Weather Forecast

Sunny
67.6°F
43.2°F
56.4°F
53%
0 in
0%
0%
10.3 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 7.53 μg/m3
PM10: 7.77 μg/m3
Carbon Monoxide: 172.29 μg/m3
Nitrogen Dioxide: 10.27 μg/m3
Sulphur Dioxide: 5.49 μg/m3
Ozone: 79.4 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:05 PM
Sunset: 8:08 PM
Daylight: 14 hrs 6 mins
Moonrise: 1:34 AM
Moon Transit: 6:21 AM
Moonset: 11:14 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%

Best Times for Fishing or Hunting

Major Periods

5:51 AM - 8:21 AM
8:00 PM - 10:30 PM

Minor Periods

10:44 AM - 12:14 AM
1:04 AM - 2:34 AM

Action Rating: 4 out of 5

Saturday, May 9, 2026

Weather Forecast

Patchy rain nearby
71.2°F
51.7°F
59.2°F
66%
0.04 in
88%
0%
13.4 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 9.45 μg/m3
PM10: 9.76 μg/m3
Carbon Monoxide: 218.93 μg/m3
Nitrogen Dioxide: 11.22 μg/m3
Sulphur Dioxide: 5.1 μg/m3
Ozone: 90.2 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:05 PM
Sunset: 8:09 PM
Daylight: 14 hrs 8 mins
Moonrise: 2:05 AM
Moon Transit: 7:07 AM
Moonset: 12:18 AM
Moon Phase: Last Quarter
Moon Illumination: 36.7%

Best Times for Fishing or Hunting

Major Periods

6:37 AM - 9:07 AM
8:46 PM - 11:16 PM

Minor Periods

11:48 AM - 1:18 PM
1:35 AM - 3:05 AM

Action Rating: 2 out of 5

Sunday, May 10, 2026

Weather Forecast

Patchy rain nearby
78.8°F
53°F
65.5°F
66%
0.04 in
63%
0%
7.2 mph
4


Air Quality

AQI: 2 - Moderate
PM2.5: 20.07 μg/m3
PM10: 20.32 μg/m3
Carbon Monoxide: 331.83 μg/m3
Nitrogen Dioxide: 42.67 μg/m3
Sulphur Dioxide: 5.7 μg/m3
Ozone: 49.92 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:05 PM
Sunset: 8:10 PM
Daylight: 14 hrs 10 mins
Moonrise: 2:33 AM
Moon Transit: 7:53 AM
Moonset: 1:22 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
12:00 AM - 12:00 AM

Minor Periods

12:52 AM - 2:22 PM
2:03 AM - 3:33 AM

Action Rating: 2 out of 5

Monday, May 11, 2026

Weather Forecast

Cloudy
60.2°F
50.4°F
53.1°F
69%
0 in
0%
0%
12.3 mph
3


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:05 PM
Sunset: 8:11 PM
Daylight: 14 hrs 11 mins
Moonrise: 2:57 AM
Moon Transit: 8:37 AM
Moonset: 2:28 PM
Moon Phase: Last Quarter
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

8:07 AM - 10:37 AM
12:00 AM - 12:00 AM

Minor Periods

1:58 PM - 3:28 PM
2:27 AM - 3:57 AM

Action Rating: 2 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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