Water Temperature of Dead Run in McLean, VA

Current Water Temperature

33.4°F

Measurement Time: Sunday, February 15, 2026, 2:00 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

41.5°F
Light rain
Light rain
38.2°F
43.8°F
96%
E 5.1 mph
8.8 mph
40.1°F
43°F
0.06 in
100%
2 mi
1014 mbar
0

Five Day Weather Forecast

Moderate rain
Sun
H: 61°F
L: 35°F
Patchy rain nearby
Mon
H: 41°F
L: 35°F
Fog
Tue
H: 39°F
L: 36°F
Fog
Wed
H: 52°F
L: 37°F
Moderate rain
Thu
H: 48°F
L: 42°F

Air Quality

AQI: 1 - Good
PM2.5: 28.25 μg/m3
PM10: 28.45 μg/m3
Carbon Monoxide: 488.85 μg/m3
Nitrogen Dioxide: 55.35 μg/m3
Sulphur Dioxide: 9.65 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:22 AM
Sunset: 5:46 PM
Daylight: 10 hrs 46 mins
Moonrise: 6:09 AM
Moon Transit: 10:58 AM
Moonset: 3:56 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:28 AM - 12:58 AM

Minor Periods

3:26 PM - 4:56 PM
5:39 AM - 7:09 AM

Action Rating: 3 out of 5

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

Effective: Sun February 15, 2026, 7:27 PM
Expires: Sun February 15, 2026, 7:37 PM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Sunday, February 15, 2026

Weather Forecast

Moderate rain
60.8°F
35.2°F
43.6°F
67%
0.44 in
88%
0%
6.5 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 32.72 μg/m3
PM10: 33.69 μg/m3
Carbon Monoxide: 558.53 μg/m3
Nitrogen Dioxide: 58.51 μg/m3
Sulphur Dioxide: 8.23 μg/m3
Ozone: 6.76 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:22 AM
Sunset: 5:46 PM
Daylight: 10 hrs 46 mins
Moonrise: 6:09 AM
Moon Transit: 10:58 AM
Moonset: 3:56 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:28 AM - 12:58 AM

Minor Periods

3:26 PM - 4:56 PM
5:39 AM - 7:09 AM

Action Rating: 3 out of 5

Monday, February 16, 2026

Weather Forecast

Patchy rain nearby
40.6°F
34.7°F
38.2°F
93%
0.08 in
83%
0%
8.3 mph
0.5


Air Quality

AQI: 2 - Moderate
PM2.5: 28.67 μg/m3
PM10: 29.07 μg/m3
Carbon Monoxide: 400.45 μg/m3
Nitrogen Dioxide: 45.17 μg/m3
Sulphur Dioxide: 10.63 μg/m3
Ozone: 24.24 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:22 AM
Sunset: 5:47 PM
Daylight: 10 hrs 48 mins
Moonrise: 6:40 AM
Moon Transit: 11:47 AM
Moonset: 5:03 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

12:39 AM - 3:09 AM
11:17 AM - 1:47 PM

Minor Periods

4:33 PM - 6:03 PM
6:10 AM - 7:40 AM

Action Rating: 4 out of 5

Tuesday, February 17, 2026

Weather Forecast

Fog
39.2°F
36.3°F
37.5°F
98%
0 in
0%
0%
5.4 mph
0.6


Air Quality

AQI: 2 - Moderate
PM2.5: 20.02 μg/m3
PM10: 20.28 μg/m3
Carbon Monoxide: 389.17 μg/m3
Nitrogen Dioxide: 38.12 μg/m3
Sulphur Dioxide: 8.86 μg/m3
Ozone: 34.92 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:22 AM
Sunset: 5:48 PM
Daylight: 10 hrs 51 mins
Moonrise: 7:07 AM
Moon Transit: 12:34 AM
Moonset: 6:11 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:26 AM - 3:56 AM
12:04 AM - 2:34 PM

Minor Periods

5:41 PM - 7:11 PM
6:37 AM - 8:07 AM

Action Rating: 5 out of 5

Wednesday, February 18, 2026

Weather Forecast

Fog
52.2°F
36.9°F
42.9°F
95%
0 in
0%
0%
7.2 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 17.93 μg/m3
PM10: 18.24 μg/m3
Carbon Monoxide: 304.66 μg/m3
Nitrogen Dioxide: 29.15 μg/m3
Sulphur Dioxide: 7.34 μg/m3
Ozone: 51 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:22 AM
Sunset: 5:49 PM
Daylight: 10 hrs 53 mins
Moonrise: 7:31 AM
Moon Transit: 1:20 PM
Moonset: 7:19 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

2:13 AM - 4:43 AM
12:50 AM - 3:20 PM

Minor Periods

6:49 PM - 8:19 PM
7:01 AM - 8:31 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Moderate rain
47.8°F
42.3°F
45.8°F
93%
0.38 in
72%
0%
8.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 6.18 μg/m3
PM10: 6.47 μg/m3
Carbon Monoxide: 185.92 μg/m3
Nitrogen Dioxide: 10.42 μg/m3
Sulphur Dioxide: 5.03 μg/m3
Ozone: 80.69 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:22 AM
Sunset: 5:51 PM
Daylight: 10 hrs 56 mins
Moonrise: 7:55 AM
Moon Transit: 4:07 PM
Moonset: 8:28 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

3:37 PM - 6:07 PM
3:37 PM - 6:07 PM

Minor Periods

7:58 PM - 9:28 PM
7:25 AM - 8:55 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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