Water Temperature of Dead Run in McLean, VA

Current Water Temperature

34.2°F

Measurement Time: Thursday, January 1, 2026, 11:00 PM EST

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

28.9°F
Overcast
Overcast
26°F
24.8°F
32%
S 2.9 mph
4.4 mph
21.2°F
1.6°F
0 in
100%
9 mi
1011 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 41°F
L: 24°F
Overcast
Sat
H: 37°F
L: 26°F
Partly Cloudy
Sun
H: 46°F
L: 30°F
Light freezing rain
Mon
H: 38°F
L: 28°F
Partly Cloudy
Tue
H: 45°F
L: 33°F

Air Quality

AQI: 2 - Moderate
PM2.5: 24.05 μg/m3
PM10: 25.05 μg/m3
Carbon Monoxide: 301.85 μg/m3
Nitrogen Dioxide: 44.55 μg/m3
Sulphur Dioxide: 13.65 μg/m3
Ozone: 20 μg/m3

Astronomical

Sunrise: 7:27 AM
Sun Transit: 12:12 AM
Sunset: 4:58 PM
Daylight: 9 hrs 31 mins
Moonrise: 4:00 PM
Moon Transit: 12:00 AM
Moonset: 6:59 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:46 AM - 3:16 PM

Minor Periods

3:30 PM - 5:00 PM
6:29 AM - 7:59 AM

Action Rating: 4 out of 5

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

Effective: Fri January 2, 2026, 1:26 AM
Expires: Fri January 2, 2026, 1:36 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Friday, January 2, 2026

Weather Forecast

Sunny
41.4°F
23.5°F
30.7°F
43%
0 in
0%
0%
6 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 19.01 μg/m3
PM10: 19.71 μg/m3
Carbon Monoxide: 248.33 μg/m3
Nitrogen Dioxide: 42.91 μg/m3
Sulphur Dioxide: 12.27 μg/m3
Ozone: 25.88 μg/m3

Astronomical

Sunrise: 7:27 AM
Sun Transit: 12:12 AM
Sunset: 4:58 PM
Daylight: 9 hrs 31 mins
Moonrise: 4:00 PM
Moon Transit: 12:00 AM
Moonset: 6:59 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:46 AM - 3:16 PM

Minor Periods

3:30 PM - 5:00 PM
6:29 AM - 7:59 AM

Action Rating: 4 out of 5

Saturday, January 3, 2026

Weather Forecast

Overcast
37.4°F
26.2°F
31.4°F
70%
0 in
0%
0%
6.5 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 15.79 μg/m3
PM10: 16.05 μg/m3
Carbon Monoxide: 286.57 μg/m3
Nitrogen Dioxide: 31.87 μg/m3
Sulphur Dioxide: 12.69 μg/m3
Ozone: 38.52 μg/m3

Astronomical

Sunrise: 7:28 AM
Sun Transit: 12:13 AM
Sunset: 4:59 PM
Daylight: 9 hrs 32 mins
Moonrise: 5:15 PM
Moon Transit: 12:01 AM
Moonset: 7:58 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:51 PM - 4:21 PM

Minor Periods

4:45 PM - 6:15 PM
7:28 AM - 8:58 AM

Action Rating: 5 out of 5

Sunday, January 4, 2026

Weather Forecast

Partly Cloudy
46.4°F
29.6°F
36.2°F
68%
0 in
0%
0%
12.1 mph
0.4


Air Quality

AQI: 2 - Moderate
PM2.5: 30.57 μg/m3
PM10: 31.54 μg/m3
Carbon Monoxide: 783.61 μg/m3
Nitrogen Dioxide: 45.26 μg/m3
Sulphur Dioxide: 15.71 μg/m3
Ozone: 23.2 μg/m3

Astronomical

Sunrise: 7:28 AM
Sun Transit: 12:13 AM
Sunset: 5:00 PM
Daylight: 9 hrs 32 mins
Moonrise: 6:33 PM
Moon Transit: 1:05 AM
Moonset: 8:45 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:35 AM - 3:05 AM
2:51 PM - 5:21 PM

Minor Periods

6:03 PM - 7:33 PM
8:15 AM - 9:45 AM

Action Rating: 4 out of 5

Monday, January 5, 2026

Weather Forecast

Light freezing rain
38.4°F
28°F
32.5°F
63%
0.02 in
81%
0%
7.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 11.69 μg/m3
PM10: 11.79 μg/m3
Carbon Monoxide: 263.59 μg/m3
Nitrogen Dioxide: 31.19 μg/m3
Sulphur Dioxide: 12.75 μg/m3
Ozone: 38.16 μg/m3

Astronomical

Sunrise: 7:28 AM
Sun Transit: 12:14 AM
Sunset: 5:01 PM
Daylight: 9 hrs 33 mins
Moonrise: 7:47 PM
Moon Transit: 2:03 AM
Moonset: 9:21 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:33 AM - 4:03 AM
3:46 PM - 6:16 PM

Minor Periods

7:17 PM - 8:47 PM
8:51 AM - 10:21 AM

Action Rating: 3 out of 5

Tuesday, January 6, 2026

Weather Forecast

Partly Cloudy
45.3°F
32.6°F
38.2°F
86%
0 in
0%
0%
6.9 mph
0


Air Quality

AQI: 2 - Moderate
PM2.5: 19.17 μg/m3
PM10: 19.24 μg/m3
Carbon Monoxide: 308.33 μg/m3
Nitrogen Dioxide: 33.17 μg/m3
Sulphur Dioxide: 10.97 μg/m3
Ozone: 20.92 μg/m3

Astronomical

Sunrise: 7:28 AM
Sun Transit: 12:14 AM
Sunset: 5:02 PM
Daylight: 9 hrs 34 mins
Moonrise: 8:58 PM
Moon Transit: 2:55 AM
Moonset: 9:51 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:25 AM - 4:55 AM
4:35 PM - 7:05 PM

Minor Periods

8:28 PM - 9:58 PM
9:21 AM - 10:51 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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