Water Temperature of Dead Run in McLean, VA

Current Water Temperature

71.4°F

Measurement Time: Wednesday, June 17, 2026, 11:15 AM 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

84.9°F
Partly cloudy
Partly cloudy
82.7°F
87.4°F
40%
WSW 7.2 mph
8.2 mph
89°F
51.9°F
0 in
50%
9 mi
1008 mbar
6.8

Five Day Weather Forecast

Sunny
Wed
H: 91°F
L: 63°F
Partly Cloudy
Thu
H: 91°F
L: 71°F
Sunny
Fri
H: 85°F
L: 66°F
Sunny
Sat
H: 84°F
L: 61°F
Moderate rain
Sun
H: 90°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 10 μg/m3
PM10: 11.1 μg/m3
Carbon Monoxide: 119 μg/m3
Nitrogen Dioxide: 1.4 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 128 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:09 PM
Sunset: 8:37 PM
Daylight: 14 hrs 54 mins
Moonrise: 8:19 AM
Moon Transit: 3:54 PM
Moonset: 11:19 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

4:42 AM - 7:12 AM
3:24 PM - 5:54 PM

Minor Periods

12:00 AM - 12:00 AM
7:49 AM - 9:19 AM

Action Rating: 2 out of 5

Small Craft Advisory issued June 17 at 9:33AM EDT until June 18 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Wed June 17, 2026, 9:33 AM
Expires: Wed June 17, 2026, 5:45 PM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt expected. * WHERE...Tidal Potomac River from Indian Head MD to Smith Point VA. * WHEN...From midnight tonight to 8 PM EDT Thursday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Wednesday, June 17, 2026

Weather Forecast

Sunny
91.4°F
62.8°F
77.7°F
52%
0 in
2%
0%
10.5 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 11.71 μg/m3
PM10: 12.78 μg/m3
Carbon Monoxide: 141.79 μg/m3
Nitrogen Dioxide: 10.16 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 90.38 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:09 PM
Sunset: 8:37 PM
Daylight: 14 hrs 54 mins
Moonrise: 8:19 AM
Moon Transit: 3:54 PM
Moonset: 11:19 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

4:42 AM - 7:12 AM
3:24 PM - 5:54 PM

Minor Periods

12:00 AM - 12:00 AM
7:49 AM - 9:19 AM

Action Rating: 2 out of 5

Thursday, June 18, 2026

Weather Forecast

Partly Cloudy
91°F
71.1°F
80.4°F
53%
0 in
17%
0%
16.6 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 5.89 μg/m3
PM10: 6.15 μg/m3
Carbon Monoxide: 139.58 μg/m3
Nitrogen Dioxide: 6.9 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 83.08 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:09 PM
Sunset: 8:37 PM
Daylight: 14 hrs 55 mins
Moonrise: 9:36 AM
Moon Transit: 4:49 PM
Moonset: 12:19 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:39 AM - 8:09 AM
4:19 PM - 6:49 PM

Minor Periods

9:06 AM - 10:36 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, June 19, 2026

Weather Forecast

Sunny
85.1°F
65.6°F
74.5°F
47%
0 in
2%
0%
12.8 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 6.06 μg/m3
PM10: 6.27 μg/m3
Carbon Monoxide: 159.92 μg/m3
Nitrogen Dioxide: 8.48 μg/m3
Sulphur Dioxide: 1.62 μg/m3
Ozone: 77.04 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:10 PM
Sunset: 8:38 PM
Daylight: 14 hrs 55 mins
Moonrise: 10:49 AM
Moon Transit: 5:39 PM
Moonset: 12:51 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

6:31 AM - 9:01 AM
5:09 PM - 7:39 PM

Minor Periods

10:19 AM - 11:49 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, June 20, 2026

Weather Forecast

Sunny
84.4°F
61.4°F
72.3°F
48%
0 in
2%
0%
12.3 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 3.89 μg/m3
PM10: 3.93 μg/m3
Carbon Monoxide: 126.49 μg/m3
Nitrogen Dioxide: 5.5 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 77.58 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:10 PM
Sunset: 8:38 PM
Daylight: 14 hrs 55 mins
Moonrise: 11:57 AM
Moon Transit: 6:25 PM
Moonset: 12:18 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%

Best Times for Fishing or Hunting

Major Periods

7:18 AM - 9:48 AM
5:55 PM - 8:25 PM

Minor Periods

11:27 AM - 12:57 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, June 21, 2026

Weather Forecast

Moderate rain
90.2°F
62.4°F
73°F
58%
0.38 in
64%
0%
10.7 mph
1.2


Air Quality

AQI: 1 - Good
PM2.5: 4.31 μg/m3
PM10: 4.38 μg/m3
Carbon Monoxide: 148.11 μg/m3
Nitrogen Dioxide: 6.84 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 61.22 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:10 PM
Sunset: 8:38 PM
Daylight: 14 hrs 55 mins
Moonrise: 1:02 PM
Moon Transit: 7:08 PM
Moonset: 12:42 AM
Moon Phase: First Quarter
Moon Illumination: 38.5%

Best Times for Fishing or Hunting

Major Periods

8:02 AM - 10:32 AM
6:38 PM - 9:08 PM

Minor Periods

12:32 AM - 2:02 PM
12:12 AM - 1:42 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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