Water Temperature of Dead Run in McLean, VA

Current Water Temperature

53.2°F

Measurement Time: Saturday, November 8, 2025, 9:00 PM EST

Temperature Locations

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Local Points of Interest

Dead Run; Langley Oaks Park

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Dead Run

Station Name: DEAD RUN AT WHANN AVENUE NEAR MCLEAN, VA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 226 feet / 69 meters

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

52°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 86%
Feels Like: 51°F
Wind: S 4.3 mph
Wind Gusts: 8.5 mph
Pressure: 29.84 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 66°F
L: 48°F
Patchy rain nearby
Mon
H: 48°F
L: 38°F
Sunny
Tue
H: 46°F
L: 31°F
Patchy rain nearby
Wed
H: 58°F
L: 36°F
Sunny
Thu
H: 54°F
L: 44°F

Air Quality

PM2.5: 8.85 μg/m3
PM10: 8.95 μg/m3
Carbon Monoxide: 223.85 μg/m3
Nitrogen Dioxide: 22.95 μg/m3
Sulphur Dioxide: 6.25 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 11:52 AM
Sunset: 5:00 PM
Daylight: 10 hrs 14 mins
Moonrise: 8:52 PM
Moon Transit: 3:41 AM
Moonset: 11:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

3:11 AM - 5:41 AM
5:30 PM - 8:00 PM

Minor Periods

8:22 PM - 9:52 PM
11:07 AM - 12:37 AM

Action Rating: 2 out of 5

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

Effective: Sun November 9, 2025, 1:26 AM
Expires: Sun November 9, 2025, 1:36 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.


Freeze Watch issued November 9 at 1:18AM EST until November 11 at 9:00AM EST by NWS Baltimore MD/Washington DC

Effective: Sun November 9, 2025, 1:18 AM
Expires: Sun November 9, 2025, 9:30 AM

* WHAT...Sub-freezing temperatures as low as 29 to 32 are possible. * WHERE...In Maryland, Calvert and St. Marys Counties. In Virginia, King George County. * WHEN...From late Monday evening through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.
Sunday, November 9, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 56.6°F
Average Humidity: 86%
Chance of Rain: 87%
Wind: 9.6 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 10.5 μg/m3
PM10: 10.67 μg/m3
Carbon Monoxide: 238.09 μg/m3
Nitrogen Dioxide: 22.41 μg/m3
Sulphur Dioxide: 6.27 μg/m3
Ozone: 62.6 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 11:52 AM
Sunset: 5:00 PM
Daylight: 10 hrs 14 mins
Moonrise: 8:52 PM
Moon Transit: 3:41 AM
Moonset: 11:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

3:11 AM - 5:41 AM
5:30 PM - 8:00 PM

Minor Periods

8:22 PM - 9:52 PM
11:07 AM - 12:37 AM

Action Rating: 2 out of 5

Monday, November 10, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 47°F
Average Humidity: 65%
Chance of Rain: 75%
Wind: 14.1 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 4.01 μg/m3
PM10: 4.04 μg/m3
Carbon Monoxide: 197.21 μg/m3
Nitrogen Dioxide: 13.05 μg/m3
Sulphur Dioxide: 6.43 μg/m3
Ozone: 54.32 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 11:52 AM
Sunset: 4:59 PM
Daylight: 10 hrs 12 mins
Moonrise: 10:05 PM
Moon Transit: 4:42 AM
Moonset: 12:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

4:12 AM - 6:42 AM
6:27 PM - 8:57 PM

Minor Periods

9:35 PM - 11:05 PM
11:53 AM - 1:23 PM

Action Rating: 3 out of 5

Tuesday, November 11, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 37.7°F
Average Humidity: 54%
Chance of Rain: 0%
Wind: 15.9 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 3.7 μg/m3
PM10: 3.89 μg/m3
Carbon Monoxide: 167.93 μg/m3
Nitrogen Dioxide: 10.92 μg/m3
Sulphur Dioxide: 6.08 μg/m3
Ozone: 57.24 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 11:52 AM
Sunset: 4:58 PM
Daylight: 10 hrs 10 mins
Moonrise: 11:16 PM
Moon Transit: 5:37 AM
Moonset: 12:58 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

5:07 AM - 7:37 AM
7:18 PM - 9:48 PM

Minor Periods

12:00 AM - 12:00 AM
12:28 AM - 1:58 PM

Action Rating: 2 out of 5

Wednesday, November 12, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 46°F
Average Humidity: 49%
Chance of Rain: 79%
Wind: 11.4 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 5.34 μg/m3
PM10: 5.4 μg/m3
Carbon Monoxide: 191 μg/m3
Nitrogen Dioxide: 15.82 μg/m3
Sulphur Dioxide: 4.61 μg/m3
Ozone: 41.23 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 11:52 AM
Sunset: 4:57 PM
Daylight: 10 hrs 8 mins
Moonrise: 12:16 AM
Moon Transit: 6:26 AM
Moonset: 1:26 PM
Moon Phase: Last Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

5:56 AM - 8:26 AM
8:05 PM - 10:35 PM

Minor Periods

12:56 AM - 2:26 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, November 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 47.9°F
Average Humidity: 59%
Chance of Rain: 0%
Wind: 13 mph
UV Index: 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: 6:50 AM
Sun Transit: 11:53 AM
Sunset: 4:56 PM
Daylight: 10 hrs 6 mins
Moonrise: 12:23 AM
Moon Transit: 7:11 AM
Moonset: 1:50 PM
Moon Phase: Last Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

6:41 AM - 9:11 AM
8:48 PM - 11:18 PM

Minor Periods

1:20 PM - 2:50 PM
12:00 AM - 12:00 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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