Water Temperature of Dead Run in McLean, VA

Current Water Temperature

32.0°F

Measurement Time: Tuesday, January 27, 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

17.1°F
Clear
Clear
8.8°F
12.8°F
53%
WNW 5.6 mph
11.1 mph
1.6°F
2.1°F
0 in
0%
9 mi
1021 mbar
0

Five Day Weather Forecast

Partly Cloudy
Wed
H: 22°F
L: 2°F
Sunny
Thu
H: 23°F
L: 12°F
Sunny
Fri
H: 19°F
L: 9°F
Moderate or heavy snow showers
Sat
H: 20°F
L: 7°F
Blizzard
Sun
H: 26°F
L: 15°F

Air Quality

PM2.5: 7.65 μg/m3
PM10: 7.75 μg/m3
Carbon Monoxide: 235.85 μg/m3
Nitrogen Dioxide: 19.25 μg/m3
Sulphur Dioxide: 3.65 μg/m3
Ozone: 56 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

Cold Weather Advisory issued January 27 at 2:06PM EST until January 28 at 11:00AM EST by NWS Baltimore MD/Washington DC

Effective: Tue January 27, 2026, 2:06 PM
Expires: Tue January 27, 2026, 10:15 PM

* WHAT...Very cold wind chills between 0 and 8 below expected. * WHERE...Washington DC, and portions of central, northeast, northern, and southern Maryland, and central, northern, and western Virginia. * WHEN...From 7 PM this evening to 11 AM EST Wednesday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. Frostbite will occur if unprotected skin is exposed to these temperatures. * 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 27 at 2:06PM EST until January 28 at 11:00AM EST by NWS Baltimore MD/Washington DC

Effective: Tue January 27, 2026, 2:06 PM
Expires: Tue January 27, 2026, 10:15 PM

* WHAT...Very cold wind chills as low as 12 below expected. * WHERE...Portions of north central and western Maryland, central, northwest, and western Virginia, and eastern West Virginia. * WHEN...From 7 PM this evening to 11 AM EST Wednesday. * IMPACTS...The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite will occur if unprotected skin is exposed to these temperatures. * 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.
Wednesday, January 28, 2026

Weather Forecast

Partly Cloudy
22.1°F
1.8°F
13.9°F
65%
0 in
0%
0%
10.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 13.19 μg/m3
PM10: 13.43 μg/m3
Carbon Monoxide: 258.57 μg/m3
Nitrogen Dioxide: 27.23 μg/m3
Sulphur Dioxide: 6.02 μg/m3
Ozone: 52.36 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

Sunny
23°F
12.2°F
17.3°F
66%
0 in
0%
0%
10.3 mph
0.5


Air Quality

AQI: 2 - Moderate
PM2.5: 17.19 μg/m3
PM10: 17.48 μg/m3
Carbon Monoxide: 271.69 μg/m3
Nitrogen Dioxide: 33.95 μg/m3
Sulphur Dioxide: 8.86 μg/m3
Ozone: 44.56 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
19.2°F
9.1°F
14.7°F
64%
0 in
0%
0%
4.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 12.47 μg/m3
PM10: 12.53 μg/m3
Carbon Monoxide: 274.61 μg/m3
Nitrogen Dioxide: 26.39 μg/m3
Sulphur Dioxide: 6.73 μg/m3
Ozone: 48.88 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

Moderate or heavy snow showers
19.8°F
7°F
15.5°F
73%
0.09 in
67%
27%
17 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 8.96 μg/m3
PM10: 9.12 μg/m3
Carbon Monoxide: 247.54 μg/m3
Nitrogen Dioxide: 25.28 μg/m3
Sulphur Dioxide: 5.56 μg/m3
Ozone: 45.46 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

Sunday, February 1, 2026

Weather Forecast

Blizzard
25.5°F
15°F
17.9°F
79%
0.11 in
75%
47%
21.5 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: 7:15 AM
Sun Transit: 12:22 AM
Sunset: 5:30 PM
Daylight: 10 hrs 15 mins
Moonrise: 5:21 PM
Moon Transit: 12:00 AM
Moonset: 7:15 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:30 PM - 4:00 PM

Minor Periods

4:51 PM - 6:21 PM
6:45 AM - 8:15 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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