Water Temperature of Difficult Run in Oakton, VA

Current Water Temperature

77.7°F

Measurement Time: Friday, July 25, 2025, 11:15 AM EDT

Temperature Locations

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Local Points of Interest

Fairfax, VA

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Difficult Run

Station Name: DIFFICULT RUN ABOVE FOX LAKE NEAR FAIRFAX, VA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 328 feet / 100 meters

Nearest Address:
11200 Lapham Dr
Oakton, VA 22124
Fairfax County

GPS Coordinates: 38.88469518, -77.3324293

Nearby Water Temperatures

Difficult Run, McLean, VA (7.8 mi)
Dead Run, McLean, VA (9.9 mi)
Washington Channel, Washington, DC (16.7 mi)
Sligo Creek, Takoma Park, MD (19.0 mi)
Paint Branch, Calverton, MD (22.3 mi)
Northeast Branch Anacostia River, Riverdale Park, MD (22.5 mi)
Patuxent River, Brighton, MD (27.6 mi)
Potomac River, Point of Rocks, MD (29.1 mi)
Carroll Creek, Frederick, MD (37.7 mi)
Spout Run, Boyce, VA (38.2 mi)
Carroll Creek, Frederick, MD (38.5 mi)
Upper Machedoc Creek, Dahlgren, VA (42.2 mi)
Scotts Level Branch, Milford Mill, MD (45.0 mi)
Severn River, Annapolis, MD (46.4 mi)
Chesapeake Bay, Annapolis, MD (47.8 mi)

Weather for Oakton, Virginia

Current Weather

97°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 48%
Feels Like: 108.5°F
Wind: WNW 4.3 mph
Wind Gusts: 5.2 mph
Pressure: 29.99 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 3

Five Day Weather Forecast

Patchy rain nearby
Fri
H: 102°F
L: 75°F
Patchy rain nearby
Sat
H: 97°F
L: 74°F
Heavy rain
Sun
H: 95°F
L: 76°F
Heavy rain
Mon
H: 99°F
L: 78°F
Sunny
Tue
H: 97°F
L: 75°F

Air Quality

AQI: 2 - Moderate
PM2.5: 36.63 μg/m3
PM10: 37.56 μg/m3
Carbon Monoxide: 382.95 μg/m3
Nitrogen Dioxide: 23.87 μg/m3
Sulphur Dioxide: 11.29 μg/m3
Ozone: 123 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:15 PM
Sunset: 8:27 PM
Daylight: 14 hrs 22 mins
Moonrise: 6:44 AM
Moon Transit: 2:08 PM
Moonset: 9:21 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

2:57 AM - 5:27 AM
1:38 PM - 4:08 PM

Minor Periods

8:51 PM - 10:21 PM
6:14 AM - 7:44 AM

Action Rating: 5 out of 5

Heat Advisory issued July 25 at 9:22AM EDT until July 25 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 25, 2025, 9:22 AM
Expires: Fri July 25, 2025, 5:30 PM

* WHAT...Heat index values up to 107 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Heat Advisory issued July 25 at 9:22AM EDT until July 25 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 25, 2025, 9:22 AM
Expires: Fri July 25, 2025, 5:30 PM

* WHAT...Heat index values up to 107 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Heat Advisory issued July 25 at 9:22AM EDT until July 25 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 25, 2025, 9:22 AM
Expires: Fri July 25, 2025, 5:30 PM

* WHAT...Heat index values up to 107 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Heat Advisory issued July 25 at 9:22AM EDT until July 25 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 25, 2025, 9:22 AM
Expires: Fri July 25, 2025, 5:30 PM

* WHAT...Heat index values up to 107 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Heat Advisory issued July 25 at 9:22AM EDT until July 25 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 25, 2025, 9:22 AM
Expires: Fri July 25, 2025, 5:30 PM

* WHAT...Heat index values up to 107 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Friday, July 25, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 87.3°F
Average Humidity: 65%
Chance of Rain: 71%
Wind: 7.6 mph
UV Index: 2.3

Air Quality

AQI: 2 - Moderate
PM2.5: 25.72 μg/m3
PM10: 26.36 μg/m3
Carbon Monoxide: 406.11 μg/m3
Nitrogen Dioxide: 14.23 μg/m3
Sulphur Dioxide: 8.63 μg/m3
Ozone: 119.12 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:15 PM
Sunset: 8:27 PM
Daylight: 14 hrs 22 mins
Moonrise: 6:44 AM
Moon Transit: 2:08 PM
Moonset: 9:21 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

2:57 AM - 5:27 AM
1:38 PM - 4:08 PM

Minor Periods

8:51 PM - 10:21 PM
6:14 AM - 7:44 AM

Action Rating: 5 out of 5

Saturday, July 26, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 85.7°F
Average Humidity: 68%
Chance of Rain: 67%
Wind: 6 mph
UV Index: 2.4

Air Quality

AQI: 2 - Moderate
PM2.5: 30.94 μg/m3
PM10: 31.38 μg/m3
Carbon Monoxide: 403.97 μg/m3
Nitrogen Dioxide: 20.32 μg/m3
Sulphur Dioxide: 11.91 μg/m3
Ozone: 123 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:15 PM
Sunset: 8:26 PM
Daylight: 14 hrs 21 mins
Moonrise: 7:54 AM
Moon Transit: 2:57 PM
Moonset: 9:48 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

3:48 AM - 6:18 AM
2:27 PM - 4:57 PM

Minor Periods

9:18 PM - 10:48 PM
7:24 AM - 8:54 AM

Action Rating: 4 out of 5

Sunday, July 27, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 85.7°F
Average Humidity: 71%
Chance of Rain: 83%
Wind: 7.2 mph
UV Index: 2.1

Air Quality

AQI: 2 - Moderate
PM2.5: 33.53 μg/m3
PM10: 34 μg/m3
Carbon Monoxide: 497.21 μg/m3
Nitrogen Dioxide: 21.04 μg/m3
Sulphur Dioxide: 6.9 μg/m3
Ozone: 118.8 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 19 mins
Moonrise: 9:01 AM
Moon Transit: 3:41 PM
Moonset: 10:12 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

4:34 AM - 7:04 AM
3:11 PM - 5:41 PM

Minor Periods

9:42 PM - 11:12 PM
8:31 AM - 10:01 AM

Action Rating: 3 out of 5

Monday, July 28, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 85.6°F
Average Humidity: 74%
Chance of Rain: 79%
Wind: 7.2 mph
UV Index: 2.7

Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 51.36 μg/m3
PM10: 51.57 μg/m3
Carbon Monoxide: 358.75 μg/m3
Nitrogen Dioxide: 43.16 μg/m3
Sulphur Dioxide: 9.25 μg/m3
Ozone: 100.4 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:15 PM
Sunset: 8:24 PM
Daylight: 14 hrs 17 mins
Moonrise: 10:04 AM
Moon Transit: 4:23 PM
Moonset: 10:33 PM
Moon Phase: Waxing Crescent
Moon Illumination: 9.3%

Best Times for Fishing or Hunting

Major Periods

5:17 AM - 7:47 AM
3:53 PM - 6:23 PM

Minor Periods

10:03 PM - 11:33 PM
9:34 AM - 11:04 AM

Action Rating: 2 out of 5

Tuesday, July 29, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 85°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 6.7 mph
UV Index: 0.1

Air Quality

AQI: 2 - Moderate
PM2.5: 38.28 μg/m3
PM10: 38.35 μg/m3
Carbon Monoxide: 555.85 μg/m3
Nitrogen Dioxide: 33.78 μg/m3
Sulphur Dioxide: 11.1 μg/m3
Ozone: 68.38 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:15 PM
Sunset: 8:23 PM
Daylight: 14 hrs 15 mins
Moonrise: 11:05 AM
Moon Transit: 5:04 PM
Moonset: 10:54 PM
Moon Phase: Waxing Crescent
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

5:58 AM - 8:28 AM
4:34 PM - 7:04 PM

Minor Periods

10:24 PM - 11:54 PM
10:35 AM - 12:05 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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