Water Temperature of Dead Run in McLean, VA

Current Water Temperature

36.3°F

Measurement Time: Saturday, January 17, 2026, 6:00 AM 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

35.1°F
Partly cloudy
Partly cloudy
26.5°F
34.4°F
72%
SSW 12.3 mph
16.6 mph
29.9°F
19.4°F
0 in
75%
9 mi
1018 mbar
1.6

Five Day Weather Forecast

Overcast
Sat
H: 40°F
L: 33°F
Heavy snow
Sun
H: 30°F
L: 23°F
Partly Cloudy
Mon
H: 33°F
L: 19°F
Partly Cloudy
Tue
H: 26°F
L: 14°F
Sunny
Wed
H: 22°F
L: 11°F

Air Quality

PM2.5: 10.35 μg/m3
PM10: 10.95 μg/m3
Carbon Monoxide: 201.85 μg/m3
Nitrogen Dioxide: 10.05 μg/m3
Sulphur Dioxide: 6.85 μg/m3
Ozone: 58 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:18 AM
Sunset: 5:13 PM
Daylight: 9 hrs 48 mins
Moonrise: 6:55 AM
Moon Transit: 11:25 AM
Moonset: 4:00 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:15 AM - 2:45 AM
10:55 AM - 1:25 PM

Minor Periods

3:30 PM - 5:00 PM
6:25 AM - 7:55 AM

Action Rating: 4 out of 5

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

Effective: Sat January 17, 2026, 7:21 AM
Expires: Sat January 17, 2026, 7:31 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.


Special Weather Statement issued January 17 at 1:51AM EST by NWS Baltimore MD/Washington DC

Effective: Sat January 17, 2026, 1:51 AM
Expires: Sat January 17, 2026, 12:00 PM

* WHAT...Snow or a rain/snow mix; accumulations will range from a coating mainly on grassy surfaces south of Interstate 70, to 1 to locally 2 inches for higher elevations such as the Catoctin Mountains and Parr's Ridge near the Pennsylvania border. * WHERE...West of Highway 15 in Loudoun County VA, and north- central MD especially for higher elevations north of Interstate 70. * WHEN...Between 6 AM and Noon EST today. * IMPACTS...Locally slippery roads and sidewalks are possible, mainly for higher elevations of northern MD. * ADDITIONAL DETAILS...Visibility may locally be reduced to one mile or less, especially during the mid-morning hours north of Interstate 70.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Saturday, January 17, 2026

Weather Forecast

Overcast
40.3°F
32.9°F
35.3°F
53%
0 in
0%
0%
12.5 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 9.93 μg/m3
PM10: 10.18 μg/m3
Carbon Monoxide: 218.84 μg/m3
Nitrogen Dioxide: 19.91 μg/m3
Sulphur Dioxide: 7.35 μg/m3
Ozone: 43.48 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:18 AM
Sunset: 5:13 PM
Daylight: 9 hrs 48 mins
Moonrise: 6:55 AM
Moon Transit: 11:25 AM
Moonset: 4:00 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:15 AM - 2:45 AM
10:55 AM - 1:25 PM

Minor Periods

3:30 PM - 5:00 PM
6:25 AM - 7:55 AM

Action Rating: 4 out of 5

Sunday, January 18, 2026

Weather Forecast

Heavy snow
30.3°F
23.2°F
28.5°F
72%
0.28 in
84%
34%
13.2 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 9.38 μg/m3
PM10: 9.67 μg/m3
Carbon Monoxide: 225.66 μg/m3
Nitrogen Dioxide: 26.46 μg/m3
Sulphur Dioxide: 7.15 μg/m3
Ozone: 37.85 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 12:19 AM
Sunset: 5:14 PM
Daylight: 9 hrs 49 mins
Moonrise: 7:35 AM
Moon Transit: 12:17 AM
Moonset: 5:04 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

1:07 AM - 3:37 AM
11:47 AM - 2:17 PM

Minor Periods

4:34 PM - 6:04 PM
7:05 AM - 8:35 AM

Action Rating: 4 out of 5

Monday, January 19, 2026

Weather Forecast

Partly Cloudy
32.5°F
19.1°F
22.5°F
74%
0 in
0%
0%
14.5 mph
0


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: 7:24 AM
Sun Transit: 12:19 AM
Sunset: 5:15 PM
Daylight: 9 hrs 51 mins
Moonrise: 8:10 AM
Moon Transit: 1:06 PM
Moonset: 6:11 PM
Moon Phase: New
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

1:58 AM - 4:28 AM
12:36 AM - 3:06 PM

Minor Periods

5:41 PM - 7:11 PM
7:40 AM - 9:10 AM

Action Rating: 5 out of 5

Tuesday, January 20, 2026

Weather Forecast

Partly Cloudy
25.7°F
13.8°F
20.1°F
60%
0 in
0%
8%
15 mph
2


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: 7:23 AM
Sun Transit: 12:19 AM
Sunset: 5:16 PM
Daylight: 9 hrs 53 mins
Moonrise: 8:39 AM
Moon Transit: 1:53 PM
Moonset: 7:17 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

2:46 AM - 5:16 AM
1:23 PM - 3:53 PM

Minor Periods

6:47 PM - 8:17 PM
8:09 AM - 9:39 AM

Action Rating: 3 out of 5

Wednesday, January 21, 2026

Weather Forecast

Sunny
21.8°F
11.2°F
16.6°F
52%
0 in
0%
0%
11.6 mph
2


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: 7:23 AM
Sun Transit: 12:20 AM
Sunset: 5:17 PM
Daylight: 9 hrs 54 mins
Moonrise: 9:04 AM
Moon Transit: 2:39 PM
Moonset: 8:24 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.1%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
2:09 PM - 4:39 PM

Minor Periods

7:54 PM - 9:24 PM
8:34 AM - 10:04 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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