Water Temperature of Dead Run in McLean, VA

Current Water Temperature

77.5°F

Measurement Time: Monday, June 30, 2025, 12:00 PM EDT

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

91°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 64%
Feels Like: 98.6°F
Wind: SSW 6.9 mph
Wind Gusts: 8 mph
Pressure: 29.9 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 3

Five Day Weather Forecast

Moderate rain
Mon
H: 94°F
L: 75°F
Heavy rain
Tue
H: 91°F
L: 71°F
Heavy rain
Wed
H: 84°F
L: 71°F
Patchy rain nearby
Thu
H: 89°F
L: 71°F
Sunny
Fri
H: 91°F
L: 68°F

Air Quality

AQI: 2 - Moderate
PM2.5: 42.74 μg/m3
PM10: 43.11 μg/m3
Carbon Monoxide: 538.35 μg/m3
Nitrogen Dioxide: 57.91 μg/m3
Sulphur Dioxide: 10.55 μg/m3
Ozone: 114 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:12 PM
Sunset: 8:39 PM
Daylight: 14 hrs 52 mins
Moonrise: 11:16 AM
Moon Transit: 5:47 PM
Moonset: 12:47 AM
Moon Phase: Waxing Crescent
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

6:42 AM - 9:12 AM
5:17 PM - 7:47 PM

Minor Periods

10:46 AM - 12:16 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

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

Effective: Mon June 30, 2025, 2:24 PM
Expires: Mon June 30, 2025, 2:34 PM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Monday, June 30, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 83.6°F
Average Humidity: 78%
Chance of Rain: 68%
Wind: 8.7 mph
UV Index: 2.5

Air Quality

AQI: 2 - Moderate
PM2.5: 35.55 μg/m3
PM10: 36.05 μg/m3
Carbon Monoxide: 527.77 μg/m3
Nitrogen Dioxide: 29.12 μg/m3
Sulphur Dioxide: 8.56 μg/m3
Ozone: 115.4 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:12 PM
Sunset: 8:39 PM
Daylight: 14 hrs 52 mins
Moonrise: 11:16 AM
Moon Transit: 5:47 PM
Moonset: 12:47 AM
Moon Phase: Waxing Crescent
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

6:42 AM - 9:12 AM
5:17 PM - 7:47 PM

Minor Periods

10:46 AM - 12:16 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, July 1, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 83°F
Average Humidity: 77%
Chance of Rain: 86%
Wind: 13.2 mph
UV Index: 2.4

Air Quality

AQI: 2 - Moderate
PM2.5: 24.81 μg/m3
PM10: 25.2 μg/m3
Carbon Monoxide: 418.99 μg/m3
Nitrogen Dioxide: 18.68 μg/m3
Sulphur Dioxide: 7.41 μg/m3
Ozone: 111.12 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:12 PM
Sunset: 8:38 PM
Daylight: 14 hrs 52 mins
Moonrise: 12:18 AM
Moon Transit: 6:28 PM
Moonset: 12:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 31.6%

Best Times for Fishing or Hunting

Major Periods

7:23 AM - 9:53 AM
5:58 PM - 8:28 PM

Minor Periods

11:48 AM - 1:18 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 2, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 76.6°F
Average Humidity: 88%
Chance of Rain: 85%
Wind: 6.3 mph
UV Index: 1.7

Air Quality

AQI: 2 - Moderate
PM2.5: 20.73 μg/m3
PM10: 21.01 μg/m3
Carbon Monoxide: 397.08 μg/m3
Nitrogen Dioxide: 22.02 μg/m3
Sulphur Dioxide: 6.62 μg/m3
Ozone: 89.68 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:12 PM
Sunset: 8:38 PM
Daylight: 14 hrs 51 mins
Moonrise: 1:17 PM
Moon Transit: 7:08 PM
Moonset: 12:30 AM
Moon Phase: First Quarter
Moon Illumination: 42.6%

Best Times for Fishing or Hunting

Major Periods

8:03 AM - 10:33 AM
6:38 PM - 9:08 PM

Minor Periods

12:47 AM - 2:17 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, July 3, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 80.1°F
Average Humidity: 68%
Chance of Rain: 79%
Wind: 8.9 mph
UV Index: 0.2

Air Quality

AQI: 2 - Moderate
PM2.5: 29.97 μg/m3
PM10: 30.2 μg/m3
Carbon Monoxide: 552.93 μg/m3
Nitrogen Dioxide: 42.37 μg/m3
Sulphur Dioxide: 9.59 μg/m3
Ozone: 92.92 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:13 PM
Sunset: 8:38 PM
Daylight: 14 hrs 50 mins
Moonrise: 2:17 PM
Moon Transit: 7:48 PM
Moonset: 12:50 AM
Moon Phase: First Quarter
Moon Illumination: 53.9%

Best Times for Fishing or Hunting

Major Periods

8:43 AM - 11:13 AM
7:18 PM - 9:48 PM

Minor Periods

1:47 PM - 3:17 PM
12:20 AM - 1:50 AM

Action Rating: 2 out of 5

Friday, July 4, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 80.3°F
Average Humidity: 53%
Chance of Rain: 0%
Wind: 4.5 mph
UV Index: 7

Air Quality

AQI: 2 - Moderate
PM2.5: 30.35 μg/m3
PM10: 30.5 μg/m3
Carbon Monoxide: 623.17 μg/m3
Nitrogen Dioxide: 49.84 μg/m3
Sulphur Dioxide: 12.67 μg/m3
Ozone: 60.38 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:13 PM
Sunset: 8:38 PM
Daylight: 14 hrs 49 mins
Moonrise: 3:17 PM
Moon Transit: 8:30 PM
Moonset: 1:12 AM
Moon Phase: First Quarter
Moon Illumination: 65.0%

Best Times for Fishing or Hunting

Major Periods

9:24 AM - 11:54 AM
8:00 PM - 10:30 PM

Minor Periods

2:47 PM - 4:17 PM
12:42 AM - 2:12 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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