Water Temperature of Dead Run in McLean, VA

Current Water Temperature

62.8°F

Measurement Time: Sunday, May 17, 2026, 12:00 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

66.9°F
Clear
Clear
66.9°F
65.7°F
81%
WNW 5.6 mph
11.2 mph
65.6°F
55.6°F
0 in
25%
9 mi
1017 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 93°F
L: 64°F
Patchy rain nearby
Mon
H: 94°F
L: 63°F
Sunny
Tue
H: 94°F
L: 66°F
Patchy rain nearby
Wed
H: 93°F
L: 67°F
Patchy rain nearby
Thu
H: 71°F
L: 53°F

Air Quality

AQI: 1 - Good
PM2.5: 14.95 μg/m3
PM10: 15.45 μg/m3
Carbon Monoxide: 210.85 μg/m3
Nitrogen Dioxide: 24.15 μg/m3
Sulphur Dioxide: 3.45 μg/m3
Ozone: 49 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:05 PM
Sunset: 8:17 PM
Daylight: 14 hrs 22 mins
Moonrise: 6:04 AM
Moon Transit: 1:56 PM
Moonset: 9:56 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

2:40 AM - 5:10 AM
1:26 PM - 3:56 PM

Minor Periods

9:26 PM - 10:56 PM
5:34 AM - 7:04 AM

Action Rating: 4 out of 5

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

Effective: Sun May 17, 2026, 2:27 AM
Expires: Sun May 17, 2026, 2:37 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Sunday, May 17, 2026

Weather Forecast

Patchy rain nearby
92.8°F
63.7°F
75.7°F
60%
0.07 in
77%
0%
6.3 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 11.86 μg/m3
PM10: 13.05 μg/m3
Carbon Monoxide: 190.01 μg/m3
Nitrogen Dioxide: 13.09 μg/m3
Sulphur Dioxide: 2.6 μg/m3
Ozone: 90.68 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:05 PM
Sunset: 8:17 PM
Daylight: 14 hrs 22 mins
Moonrise: 6:04 AM
Moon Transit: 1:56 PM
Moonset: 9:56 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

2:40 AM - 5:10 AM
1:26 PM - 3:56 PM

Minor Periods

9:26 PM - 10:56 PM
5:34 AM - 7:04 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Patchy rain nearby
94.2°F
62.9°F
76.5°F
69%
0 in
66%
0%
9.6 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 13.82 μg/m3
PM10: 16.18 μg/m3
Carbon Monoxide: 255.61 μg/m3
Nitrogen Dioxide: 12.7 μg/m3
Sulphur Dioxide: 2.31 μg/m3
Ozone: 97.48 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:05 PM
Sunset: 8:18 PM
Daylight: 14 hrs 24 mins
Moonrise: 7:01 AM
Moon Transit: 3:03 PM
Moonset: 11:06 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

3:47 AM - 6:17 AM
2:33 PM - 5:03 PM

Minor Periods

12:00 AM - 12:00 AM
6:31 AM - 8:01 AM

Action Rating: 4 out of 5

Tuesday, May 19, 2026

Weather Forecast

Sunny
94.4°F
65.5°F
79.1°F
56%
0 in
0%
0%
9.4 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 10.2 μg/m3
PM10: 12.91 μg/m3
Carbon Monoxide: 179.09 μg/m3
Nitrogen Dioxide: 5.82 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 105.16 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:05 PM
Sunset: 8:18 PM
Daylight: 14 hrs 26 mins
Moonrise: 8:10 AM
Moon Transit: 4:09 PM
Moonset: 12:06 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

4:54 AM - 7:24 AM
3:39 PM - 6:09 PM

Minor Periods

7:40 AM - 9:10 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Patchy rain nearby
93.2°F
67°F
76.3°F
63%
0.19 in
89%
0%
13.2 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 9.54 μg/m3
PM10: 11.72 μg/m3
Carbon Monoxide: 166.73 μg/m3
Nitrogen Dioxide: 5.87 μg/m3
Sulphur Dioxide: 1.97 μg/m3
Ozone: 101.04 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:05 PM
Sunset: 8:19 PM
Daylight: 14 hrs 28 mins
Moonrise: 9:25 AM
Moon Transit: 5:11 PM
Moonset: 12:03 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

5:58 AM - 8:28 AM
4:41 PM - 7:11 PM

Minor Periods

8:55 AM - 10:25 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, May 21, 2026

Weather Forecast

Patchy rain nearby
71.3°F
53.2°F
60.9°F
80%
0.14 in
87%
0%
10.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.33 μg/m3
PM10: 6.47 μg/m3
Carbon Monoxide: 198.22 μg/m3
Nitrogen Dioxide: 13.39 μg/m3
Sulphur Dioxide: 2.24 μg/m3
Ozone: 54.85 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:05 PM
Sunset: 8:20 PM
Daylight: 14 hrs 29 mins
Moonrise: 10:41 AM
Moon Transit: 6:07 PM
Moonset: 12:48 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

6:57 AM - 9:27 AM
5:37 PM - 8:07 PM

Minor Periods

10:11 AM - 11:41 AM
12:18 AM - 1:48 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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