Water Temperature of Dead Run in McLean, VA

Current Water Temperature

59.2°F

Measurement Time: Wednesday, October 7, 2026, 11:15 PM EDT

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

56.1°F

Conditions: Clear
Humidity: 78%
Feels Like: 53.6°F
Wind: SSW 4.7 mph
Wind Gusts: 10.7 mph

Pressure: 29.85 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0

Weather Forecast

Thu
H: 78°F
L: 56°F

Fri
H: 73°F
L: 53°F

Sat
H: 74°F
L: 58°F

Sun
H: 66°F
L: 61°F

Mon
H: 71°F
L: 62°F

Air Quality

AQI: 1 - Good

PM2.5: 4.8 μg/m3

PM10: 4.8 μg/m3

Carbon Monoxide: 156 μg/m3
Nitrogen Dioxide: 7.8 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 7:11 AM
Sun Transit: 12:56 AM
Sunset: 6:41 PM
Daylight: 11 hrs 29 mins

Moonrise: 4:59 AM
Moon Transit: 11:22 AM
Moonset: 5:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:15 AM - 2:45 AM
10:52 AM - 1:22 PM

Minor Periods

5:04 PM - 6:34 PM
4:29 AM - 5:59 AM

Action Rating: 3 out of 5

Thursday, October 8, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 64.8°F
Average Humidity: 52%

Chance of Rain: 2%
Wind: 10.7 mph
UV Index: 4.7

Air Quality

AQI: 1 - Good

PM2.5: 7.37 μg/m3

PM10: 7.44 μg/m3

Carbon Monoxide: 165.58 μg/m3
Nitrogen Dioxide: 14.75 μg/m3
Sulphur Dioxide: 2.34 μg/m3
Ozone: 68.63 μg/m3

Astronomical

Sunrise: 7:11 AM
Sun Transit: 12:56 AM
Sunset: 6:41 PM
Daylight: 11 hrs 29 mins

Moonrise: 4:59 AM
Moon Transit: 11:22 AM
Moonset: 5:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:15 AM - 2:45 AM
10:52 AM - 1:22 PM

Minor Periods

5:04 PM - 6:34 PM
4:29 AM - 5:59 AM

Action Rating: 3 out of 5

Friday, October 9, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 62.4°F
Average Humidity: 45%

Chance of Rain: 9%
Wind: 8.5 mph
UV Index: 3.1

Air Quality

AQI: 1 - Good

PM2.5: 13.57 μg/m3

PM10: 13.98 μg/m3

Carbon Monoxide: 203.75 μg/m3
Nitrogen Dioxide: 30.26 μg/m3
Sulphur Dioxide: 3.05 μg/m3
Ozone: 47.08 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:55 AM
Sunset: 6:39 PM
Daylight: 11 hrs 27 mins

Moonrise: 6:06 AM
Moon Transit: 12:06 AM
Moonset: 5:57 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

1:00 AM - 3:30 AM
11:36 AM - 2:06 PM

Minor Periods

5:27 PM - 6:57 PM
5:36 AM - 7:06 AM

Action Rating: 4 out of 5

Saturday, October 10, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 64.3°F
Average Humidity: 51%

Chance of Rain: 12%
Wind: 7.2 mph
UV Index: 4.3

Air Quality

AQI: 1 - Good

PM2.5: 10.83 μg/m3

PM10: 11.59 μg/m3

Carbon Monoxide: 214.25 μg/m3
Nitrogen Dioxide: 23.29 μg/m3
Sulphur Dioxide: 2.66 μg/m3
Ozone: 49.08 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 12:55 AM
Sunset: 6:38 PM
Daylight: 11 hrs 25 mins

Moonrise: 7:12 AM
Moon Transit: 12:51 AM
Moonset: 6:22 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

1:44 AM - 4:14 AM
12:21 AM - 2:51 PM

Minor Periods

5:52 PM - 7:22 PM
6:42 AM - 8:12 AM

Action Rating: 3 out of 5

Sunday, October 11, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 63°F
Average Humidity: 87%

Chance of Rain: 91%
Wind: 13.9 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good

PM2.5: 8.11 μg/m3

PM10: 10.42 μg/m3

Carbon Monoxide: 143.94 μg/m3
Nitrogen Dioxide: 8.83 μg/m3
Sulphur Dioxide: 1.32 μg/m3
Ozone: 67.38 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:55 AM
Sunset: 6:36 PM
Daylight: 11 hrs 22 mins

Moonrise: 8:18 AM
Moon Transit: 1:37 PM
Moonset: 6:48 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
1:07 PM - 3:37 PM

Minor Periods

6:18 PM - 7:48 PM
7:48 AM - 9:18 AM

Action Rating: 4 out of 5

Monday, October 12, 2026

Weather Forecast

Conditions: Mist
Average Temperature: 64.9°F
Average Humidity: 89%

Chance of Rain: 79%
Wind: 11.4 mph
UV Index: 5

Air Quality

AQI: 1 - Good

PM2.5: 1.72 μg/m3

PM10: 1.77 μg/m3

Carbon Monoxide: 137 μg/m3
Nitrogen Dioxide: 6.37 μg/m3
Sulphur Dioxide: 0.82 μg/m3
Ozone: 44.33 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 12:55 AM
Sunset: 6:35 PM
Daylight: 11 hrs 20 mins

Moonrise: 9:23 AM
Moon Transit: 2:24 PM
Moonset: 7:18 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

3:16 AM - 5:46 AM
1:54 PM - 4:24 PM

Minor Periods

6:48 PM - 8:18 PM
8:53 AM - 10:23 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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