Water Temperature of Dead Run in McLean, VA

Current Water Temperature

71.4°F

Measurement Time: Saturday, August 29, 2026, 12:15 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

67°F

Conditions: Mostly Clear

Humidity: 78%

Wind: N 5 mph

Dew Point: 60°F

Weather Forecast

Overnight
64°F - Mostly Clear

Saturday
86°F - Mostly Sunny

Saturday Night
67°F - Mostly Clear

Sunday
91°F - Mostly Sunny then Slight Chance Showers And Thunderstorms

Sunday Night
73°F - Slight Chance Showers And Thunderstorms then Mostly Cloudy

Monday
93°F - Partly Sunny

Monday Night
74°F - Slight Chance Showers And Thunderstorms

Tuesday
95°F - Partly Sunny

Tuesday Night
76°F - Slight Chance Showers And Thunderstorms

Wednesday
96°F - Mostly Sunny then Slight Chance Showers And Thunderstorms

Wednesday Night
76°F - Chance Showers And Thunderstorms

Thursday
93°F - Chance Showers And Thunderstorms

Thursday Night
72°F - Chance Showers And Thunderstorms

Friday
88°F - Mostly Sunny then Slight Chance Showers And Thunderstorms

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:09 PM
Sunset: 7:43 PM
Daylight: 13 hrs 8 mins

Moonrise: 8:22 PM
Moon Transit: 1:54 AM
Moonset: 8:00 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
12:00 AM - 12:00 AM

Minor Periods

7:52 PM - 9:22 PM
7:30 AM - 9:00 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:35 AM
Sun Transit: 1:09 PM
Sunset: 7:43 PM
Daylight: 13 hrs 8 mins

Moonrise: 8:22 PM
Moon Transit: 1:54 AM
Moonset: 8:00 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
12:00 AM - 12:00 AM

Minor Periods

7:52 PM - 9:22 PM
7:30 AM - 9:00 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:35 AM
Sun Transit: 1:09 PM
Sunset: 7:43 PM
Daylight: 13 hrs 8 mins

Moonrise: 8:22 PM
Moon Transit: 1:54 AM
Moonset: 8:00 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
12:00 AM - 12:00 AM

Minor Periods

7:52 PM - 9:22 PM
7:30 AM - 9:00 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:35 AM
Sun Transit: 1:09 PM
Sunset: 7:43 PM
Daylight: 13 hrs 8 mins

Moonrise: 8:22 PM
Moon Transit: 1:54 AM
Moonset: 8:00 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
12:00 AM - 12:00 AM

Minor Periods

7:52 PM - 9:22 PM
7:30 AM - 9:00 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:36 AM
Sun Transit: 1:09 PM
Sunset: 7:42 PM
Daylight: 13 hrs 6 mins

Moonrise: 8:46 PM
Moon Transit: 12:49 AM
Moonset: 9:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
12:19 AM - 2:49 AM

Minor Periods

8:16 PM - 9:46 PM
8:36 AM - 10:06 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:36 AM
Sun Transit: 1:09 PM
Sunset: 7:42 PM
Daylight: 13 hrs 6 mins

Moonrise: 8:46 PM
Moon Transit: 12:49 AM
Moonset: 9:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
12:19 AM - 2:49 AM

Minor Periods

8:16 PM - 9:46 PM
8:36 AM - 10:06 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:37 AM
Sun Transit: 1:08 PM
Sunset: 7:40 PM
Daylight: 13 hrs 3 mins

Moonrise: 9:12 PM
Moon Transit: 3:23 AM
Moonset: 10:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
5:03 PM - 7:33 PM

Minor Periods

8:42 PM - 10:12 PM
9:44 AM - 11:14 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:37 AM
Sun Transit: 1:08 PM
Sunset: 7:40 PM
Daylight: 13 hrs 3 mins

Moonrise: 9:12 PM
Moon Transit: 3:23 AM
Moonset: 10:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
5:03 PM - 7:33 PM

Minor Periods

8:42 PM - 10:12 PM
9:44 AM - 11:14 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:38 AM
Sun Transit: 1:08 PM
Sunset: 7:39 PM
Daylight: 13 hrs 1 mins

Moonrise: 9:42 PM
Moon Transit: 4:12 AM
Moonset: 11:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:42 AM - 6:12 AM
5:53 PM - 8:23 PM

Minor Periods

9:12 PM - 10:42 PM
10:54 AM - 12:24 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:38 AM
Sun Transit: 1:08 PM
Sunset: 7:39 PM
Daylight: 13 hrs 1 mins

Moonrise: 9:42 PM
Moon Transit: 4:12 AM
Moonset: 11:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:42 AM - 6:12 AM
5:53 PM - 8:23 PM

Minor Periods

9:12 PM - 10:42 PM
10:54 AM - 12:24 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:39 AM
Sun Transit: 1:08 PM
Sunset: 7:37 PM
Daylight: 12 hrs 58 mins

Moonrise: 10:19 PM
Moon Transit: 5:03 AM
Moonset: 12:38 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:33 AM - 7:03 AM
6:48 PM - 9:18 PM

Minor Periods

9:49 PM - 11:19 PM
12:08 AM - 1:38 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:39 AM
Sun Transit: 1:08 PM
Sunset: 7:37 PM
Daylight: 12 hrs 58 mins

Moonrise: 10:19 PM
Moon Transit: 5:03 AM
Moonset: 12:38 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:33 AM - 7:03 AM
6:48 PM - 9:18 PM

Minor Periods

9:49 PM - 11:19 PM
12:08 AM - 1:38 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:40 AM
Sun Transit: 1:08 PM
Sunset: 7:36 PM
Daylight: 12 hrs 56 mins

Moonrise: 11:05 PM
Moon Transit: 6:00 AM
Moonset: 1:51 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
7:46 PM - 10:16 PM

Minor Periods

12:00 AM - 12:00 AM
1:21 PM - 2:51 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:40 AM
Sun Transit: 1:08 PM
Sunset: 7:36 PM
Daylight: 12 hrs 56 mins

Moonrise: 11:05 PM
Moon Transit: 6:00 AM
Moonset: 1:51 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
7:46 PM - 10:16 PM

Minor Periods

12:00 AM - 12:00 AM
1:21 PM - 2:51 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:41 AM
Sun Transit: 1:07 PM
Sunset: 7:34 PM
Daylight: 12 hrs 54 mins

Moonrise: 12:05 AM
Moon Transit: 7:00 AM
Moonset: 3:01 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:30 AM - 9:00 AM
8:48 PM - 11:18 PM

Minor Periods

2:31 PM - 4:01 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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