Water Temperature of Dead Run in McLean, VA

Current Water Temperature

32.0°F

Measurement Time: Monday, January 26, 2026, 8:00 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

15.1°F
Clear
Clear
4.5°F
10.2°F
55%
WNW 7.6 mph
14.2 mph
-4.3°F
0.2°F
0 in
0%
9 mi
1022 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 26°F
L: 1°F
Partly Cloudy
Wed
H: 21°F
L: 10°F
Partly Cloudy
Thu
H: 24°F
L: 13°F
Sunny
Fri
H: 17°F
L: -0°F
Partly Cloudy
Sat
H: 17°F
L: 0°F

Air Quality

PM2.5: 9.05 μg/m3
PM10: 9.35 μg/m3
Carbon Monoxide: 256.85 μg/m3
Nitrogen Dioxide: 34.25 μg/m3
Sulphur Dioxide: 5.15 μg/m3
Ozone: 37 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 12:21 AM
Sunset: 5:24 PM
Daylight: 10 hrs 5 mins
Moonrise: 11:51 AM
Moon Transit: 7:35 PM
Moonset: 2:14 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
7:05 PM - 9:35 PM

Minor Periods

11:21 AM - 12:51 AM
1:44 AM - 3:14 AM

Action Rating: 2 out of 5

Cold Weather Advisory issued January 26 at 2:59PM EST until January 27 at 11:00AM EST by NWS Baltimore MD/Washington DC

Effective: Mon January 26, 2026, 2:59 PM
Expires: Mon January 26, 2026, 11:00 PM

* WHAT...Very cold wind chills as low as 5 to 8 below zero expected. * WHERE...Portions of DC, central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...From 7 PM this evening to 11 AM EST Tuesday. * IMPACTS...The cold wind chills as low as 5 to 8 below zero could result in hypothermia if precautions are not taken. * ADDITIONAL DETAILS...Additional Cold Weather Headlines are expected at times through the end of the week as the region remains in an Arctic Airmass.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make sure outdoor animals have a warm, dry shelter, food, and unfrozen water.


Cold Weather Advisory issued January 26 at 2:59PM EST until January 27 at 11:00AM EST by NWS Baltimore MD/Washington DC

Effective: Mon January 26, 2026, 2:59 PM
Expires: Mon January 26, 2026, 11:00 PM

* WHAT...Very cold wind chills as low as 15 to 18 below zero expected. * WHERE...Portions of north central and western Maryland, northwest Virginia, and eastern and panhandle West Virginia. * WHEN...From 7 PM this evening to 11 AM EST Tuesday. * IMPACTS...The dangerously cold wind chills as low as 15 to 18 below zero could result in hypothermia or frostbite if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS...Additional Cold Weather Headlines are expected at times through the end of the week as the region remains in an Arctic Airmass.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make sure outdoor animals have a warm, dry shelter, food, and unfrozen water.
Tuesday, January 27, 2026

Weather Forecast

Sunny
26.1°F
0.5°F
14.8°F
66%
0 in
0%
0%
10.1 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 12.2 μg/m3
PM10: 12.51 μg/m3
Carbon Monoxide: 273.29 μg/m3
Nitrogen Dioxide: 23.35 μg/m3
Sulphur Dioxide: 5.45 μg/m3
Ozone: 56.6 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 12:21 AM
Sunset: 5:24 PM
Daylight: 10 hrs 5 mins
Moonrise: 11:51 AM
Moon Transit: 7:35 PM
Moonset: 2:14 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
7:05 PM - 9:35 PM

Minor Periods

11:21 AM - 12:51 AM
1:44 AM - 3:14 AM

Action Rating: 2 out of 5

Wednesday, January 28, 2026

Weather Forecast

Partly Cloudy
20.5°F
9.5°F
16.1°F
69%
0 in
0%
0%
9.8 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 14.66 μg/m3
PM10: 14.88 μg/m3
Carbon Monoxide: 261.97 μg/m3
Nitrogen Dioxide: 28.76 μg/m3
Sulphur Dioxide: 6.09 μg/m3
Ozone: 51.4 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 12:21 AM
Sunset: 5:25 PM
Daylight: 10 hrs 7 mins
Moonrise: 12:39 AM
Moon Transit: 8:37 PM
Moonset: 3:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

9:23 AM - 11:53 AM
8:07 PM - 10:37 PM

Minor Periods

12:09 AM - 1:39 PM
2:59 AM - 4:29 AM

Action Rating: 2 out of 5

Thursday, January 29, 2026

Weather Forecast

Partly Cloudy
24.1°F
12.9°F
17.8°F
65%
0 in
0%
0%
9.2 mph
0.5


Air Quality

AQI: 2 - Moderate
PM2.5: 17.09 μg/m3
PM10: 17.35 μg/m3
Carbon Monoxide: 300.15 μg/m3
Nitrogen Dioxide: 35.41 μg/m3
Sulphur Dioxide: 7.87 μg/m3
Ozone: 43.16 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 12:21 AM
Sunset: 5:26 PM
Daylight: 10 hrs 9 mins
Moonrise: 1:39 PM
Moon Transit: 9:42 PM
Moonset: 4:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:27 AM - 12:57 AM
9:12 PM - 11:42 PM

Minor Periods

1:09 PM - 2:39 PM
4:11 AM - 5:41 AM

Action Rating: 2 out of 5

Friday, January 30, 2026

Weather Forecast

Sunny
17°F
-0.4°F
8.8°F
83%
0 in
0%
6%
11 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 8.4 μg/m3
PM10: 8.43 μg/m3
Carbon Monoxide: 231.71 μg/m3
Nitrogen Dioxide: 22.29 μg/m3
Sulphur Dioxide: 5.36 μg/m3
Ozone: 48.85 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 12:22 AM
Sunset: 5:28 PM
Daylight: 10 hrs 11 mins
Moonrise: 2:49 PM
Moon Transit: 10:46 PM
Moonset: 5:43 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

11:31 AM - 2:01 PM
12:00 AM - 12:00 AM

Minor Periods

2:19 PM - 3:49 PM
5:13 AM - 6:43 AM

Action Rating: 2 out of 5

Saturday, January 31, 2026

Weather Forecast

Partly Cloudy
16.6°F
0.4°F
6.1°F
87%
0 in
0%
0%
10.7 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: 7:16 AM
Sun Transit: 12:22 AM
Sunset: 5:29 PM
Daylight: 10 hrs 13 mins
Moonrise: 4:05 PM
Moon Transit: 11:46 PM
Moonset: 6:35 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

12:33 AM - 3:03 PM
12:00 AM - 12:00 AM

Minor Periods

3:35 PM - 5:05 PM
6:05 AM - 7:35 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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