Water Temperature of Dead Run in McLean, VA

Current Water Temperature

51.8°F 11.0°C
Cold Thermal Gear Required
51.8°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

Measurement Time: Friday, November 13, 2026, 7:15 AM 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

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

47.8°F
Mainly Sunny
Conditions: Mainly Sunny
Humidity: 52%
Feels Like: 38.3°F
Wind: NNW 13.2 mph
Wind Gusts: 21 mph
Pressure: 29.71 in
Precipitation: 0 in
Cloud Cover: 38%
Visibility: 20.6 mi
UV Index: 2.4

Five-Day Weather Forecast

Overcast
Fri
H: 49°F
L: 37°F
Overcast
Sat
H: 48°F
L: 33°F
Light Drizzle
Sun
H: 49°F
L: 37°F
Mainly Sunny
Mon
H: 54°F
L: 39°F
Sunny
Tue
H: 56°F
L: 39°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
1.5 μg/m³
Good
PM10
1.5 μg/m³
Good
Ozone (O3)
70 μg/m³
Photochemical
NO2
4 μg/m³
Nitrogen Dioxide
SO2
1 μg/m³
Sulfur Dioxide
CO
133 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 7m daylight
Sunrise 6:50 AM
Solar Noon 11:53 AM
Sunset 4:56 PM
Moon
Waxing Crescent • 13%
Moonrise 10:57 AM
Transit 3:29 PM
Moonset 8:05 PM

Best Times for Fishing or Hunting

Major Periods

2:34 AM - 5:04 AM
2:59 PM - 5:29 PM

Minor Periods

10:27 AM - 11:57 AM
7:35 PM - 9:05 PM
Action Rating:
Fair Action 2/5
Friday, November 13, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 45.7°F
Average Humidity: 59%
Chance of Rain: 1%
Wind: 14 mph
UV Index: 2.5

Air Quality

EPA Index 1 • Good
PM2.5
2 μg/m³
Good
PM10
2.1 μg/m³
Good
Ozone (O3)
59.6 μg/m³
Photochemical
NO2
7.3 μg/m³
Nitrogen Dioxide
SO2
1 μg/m³
Sulfur Dioxide
CO
141.9 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 7m daylight
Sunrise 6:50 AM
Solar Noon 11:53 AM
Sunset 4:56 PM
Moon
Waxing Crescent • 13%
Moonrise 10:57 AM
Transit 3:29 PM
Moonset 8:05 PM

Best Times for Fishing or Hunting

Major Periods

2:34 AM - 5:04 AM
2:59 PM - 5:29 PM

Minor Periods

10:27 AM - 11:57 AM
7:35 PM - 9:05 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 40.3°F
Average Humidity: 64%
Chance of Rain: 2%
Wind: 13.5 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
2.7 μg/m³
Good
PM10
2.7 μg/m³
Good
Ozone (O3)
53 μg/m³
Photochemical
NO2
7.8 μg/m³
Nitrogen Dioxide
SO2
1.6 μg/m³
Sulfur Dioxide
CO
135.3 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 5m daylight
Sunrise 6:51 AM
Solar Noon 11:53 AM
Sunset 4:56 PM
Moon
Waxing Crescent • 21%
Moonrise 11:36 AM
Transit 4:18 PM
Moonset 9:05 PM

Best Times for Fishing or Hunting

Major Periods

3:24 AM - 5:54 AM
3:48 PM - 6:18 PM

Minor Periods

11:06 AM - 12:36 PM
8:35 PM - 10:05 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Light Drizzle
Average Temperature: 43.9°F
Average Humidity: 64%
Chance of Rain: 2%
Wind: 11.7 mph
UV Index: 2

Air Quality

EPA Index 1 • Good
PM2.5
3.1 μg/m³
Good
PM10
3.2 μg/m³
Good
Ozone (O3)
50.6 μg/m³
Photochemical
NO2
12.4 μg/m³
Nitrogen Dioxide
SO2
1.6 μg/m³
Sulfur Dioxide
CO
134.5 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 3m daylight
Sunrise 6:52 AM
Solar Noon 11:53 AM
Sunset 4:55 PM
Moon
Waxing Crescent • 31%
Moonrise 12:09 PM
Transit 5:04 PM
Moonset 10:07 PM

Best Times for Fishing or Hunting

Major Periods

4:12 AM - 6:42 AM
4:34 PM - 7:04 PM

Minor Periods

11:39 AM - 1:09 PM
9:37 PM - 11:07 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Mainly Sunny
Average Temperature: 45.5°F
Average Humidity: 57%
Chance of Rain: 0%
Wind: 8.3 mph
UV Index: 3.3

Air Quality

EPA Index 1 • Good
PM2.5
6.6 μg/m³
Good
PM10
6.7 μg/m³
Good
Ozone (O3)
42.2 μg/m³
Photochemical
NO2
20.4 μg/m³
Nitrogen Dioxide
SO2
1.6 μg/m³
Sulfur Dioxide
CO
164.3 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 1m daylight
Sunrise 6:53 AM
Solar Noon 11:53 AM
Sunset 4:54 PM
Moon
First Quarter • 42%
Moonrise 12:38 PM
Transit 5:49 PM
Moonset 11:09 PM

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
5:19 PM - 7:49 PM

Minor Periods

12:08 PM - 1:38 PM
10:39 PM - 12:09 AM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 46.6°F
Average Humidity: 57%
Chance of Rain: 0%
Wind: 4.7 mph
UV Index: 3.3

Air Quality

EPA Index 2 • Moderate
PM2.5
11.8 μg/m³
Good
PM10
12.1 μg/m³
Good
Ozone (O3)
34.2 μg/m³
Photochemical
NO2
22.7 μg/m³
Nitrogen Dioxide
SO2
4 μg/m³
Sulfur Dioxide
CO
228.4 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 59m daylight
Sunrise 6:54 AM
Solar Noon 11:53 AM
Sunset 4:53 PM
Moon
First Quarter • 54%
Moonrise 1:02 PM
Transit 6:32 PM
Moonset 1:28 AM

Best Times for Fishing or Hunting

Major Periods

5:41 AM - 8:11 AM
6:02 PM - 8:32 PM

Minor Periods

12:58 AM - 2:28 AM
12:32 PM - 2:02 PM
Action Rating:
Fair Action 2/5
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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