Water Temperature of Difficult Run in Oakton, VA

Current Water Temperature

38.5°F

Measurement Time: Friday, February 20, 2026, 4:15 AM EST

Temperature Locations

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Local Points of Interest

Fairfax, VA

Difficult Run

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

Elevation Above Sea Level: 328 feet

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 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 mi)
Severn River, Annapolis, MD (46.4 mi)
Chesapeake Bay, Annapolis, MD (47.8 mi)

Weather for Oakton, Virginia

Current Weather

39.9°F
Overcast
Overcast
38.9°F
39.5°F
93%
S 2.5 mph
4.1 mph
35.5°F
37.9°F
0.1 in
100%
6 mi
1006 mbar
0.6

Five Day Weather Forecast

Moderate rain
Fri
H: 62°F
L: 37°F
Overcast
Sat
H: 47°F
L: 39°F
Heavy rain
Sun
H: 35°F
L: 33°F
Moderate or heavy snow showers
Mon
H: 40°F
L: 31°F
Light freezing rain
Tue
H: 33°F
L: 21°F

Air Quality

AQI: 1 - Good
PM2.5: 5.25 μg/m3
PM10: 5.25 μg/m3
Carbon Monoxide: 216.85 μg/m3
Nitrogen Dioxide: 9.85 μg/m3
Sulphur Dioxide: 4.15 μg/m3
Ozone: 79 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:23 AM
Sunset: 5:52 PM
Daylight: 10 hrs 58 mins
Moonrise: 8:20 AM
Moon Transit: 12:00 AM
Moonset: 9:38 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:44 AM - 6:14 AM

Minor Periods

9:08 PM - 10:38 PM
7:50 AM - 9:20 AM

Action Rating: 2 out of 5

Special Weather Statement issued February 20 at 3:30AM EST by NWS Baltimore MD/Washington DC

Effective: Fri February 20, 2026, 3:30 AM
Expires: Fri February 20, 2026, 9:00 AM

Areas of fog are expected to impact the area through mid-morning. The fog will be dense at times with visibilities below one quarter of a mile. Motorists should slow down as they encounter reduced visibilities and maintain a safe distance between vehicles. When encountering fog, be sure to turn on low beam headlights, slow down, and increase following distance.


This is only a test for monitoring of vital dissemination systems.

Effective: Fri February 20, 2026, 7:27 AM
Expires: Fri February 20, 2026, 7:37 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Friday, February 20, 2026

Weather Forecast

Moderate rain
61.9°F
37.2°F
45.6°F
89%
0.64 in
88%
0%
14.8 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 7.05 μg/m3
PM10: 7.56 μg/m3
Carbon Monoxide: 256.09 μg/m3
Nitrogen Dioxide: 17.37 μg/m3
Sulphur Dioxide: 3.69 μg/m3
Ozone: 66.84 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:23 AM
Sunset: 5:52 PM
Daylight: 10 hrs 58 mins
Moonrise: 8:20 AM
Moon Transit: 12:00 AM
Moonset: 9:38 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:44 AM - 6:14 AM

Minor Periods

9:08 PM - 10:38 PM
7:50 AM - 9:20 AM

Action Rating: 2 out of 5

Saturday, February 21, 2026

Weather Forecast

Overcast
46.8°F
38.8°F
42.3°F
65%
0 in
0%
0%
10.5 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 6.83 μg/m3
PM10: 6.92 μg/m3
Carbon Monoxide: 256.57 μg/m3
Nitrogen Dioxide: 17.95 μg/m3
Sulphur Dioxide: 7.91 μg/m3
Ozone: 61.2 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:22 AM
Sunset: 5:54 PM
Daylight: 11 hrs 1 mins
Moonrise: 8:46 AM
Moon Transit: 3:41 PM
Moonset: 10:51 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

4:31 AM - 7:01 AM
3:11 PM - 5:41 PM

Minor Periods

10:21 PM - 11:51 PM
8:16 AM - 9:46 AM

Action Rating: 4 out of 5

Sunday, February 22, 2026

Weather Forecast

Heavy rain
34.9°F
33.3°F
34.7°F
92%
0.93 in
86%
10%
14.3 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 17.27 μg/m3
PM10: 17.54 μg/m3
Carbon Monoxide: 487.33 μg/m3
Nitrogen Dioxide: 39.19 μg/m3
Sulphur Dioxide: 10.32 μg/m3
Ozone: 23.96 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:22 AM
Sunset: 5:55 PM
Daylight: 11 hrs 3 mins
Moonrise: 9:15 AM
Moon Transit: 4:34 PM
Moonset: 12:05 PM
Moon Phase: Waxing Crescent
Moon Illumination: 29.1%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
4:04 PM - 6:34 PM

Minor Periods

12:00 AM - 12:00 AM
8:45 AM - 10:15 AM

Action Rating: 2 out of 5

Monday, February 23, 2026

Weather Forecast

Moderate or heavy snow showers
40.3°F
30.8°F
33.4°F
88%
1.49 in
76%
27%
15.7 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 6.41 μg/m3
PM10: 6.52 μg/m3
Carbon Monoxide: 296.09 μg/m3
Nitrogen Dioxide: 16.09 μg/m3
Sulphur Dioxide: 7.37 μg/m3
Ozone: 46 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:22 AM
Sunset: 5:56 PM
Daylight: 11 hrs 6 mins
Moonrise: 9:51 AM
Moon Transit: 5:30 PM
Moonset: 12:05 AM
Moon Phase: First Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

6:16 AM - 8:46 AM
5:00 PM - 7:30 PM

Minor Periods

9:21 AM - 10:51 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, February 24, 2026

Weather Forecast

Light freezing rain
32.5°F
20.9°F
27.5°F
87%
0 in
71%
17%
13.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.67 μg/m3
PM10: 4.69 μg/m3
Carbon Monoxide: 261.14 μg/m3
Nitrogen Dioxide: 15.84 μg/m3
Sulphur Dioxide: 5.73 μg/m3
Ozone: 53.54 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:22 AM
Sunset: 5:57 PM
Daylight: 11 hrs 8 mins
Moonrise: 10:36 AM
Moon Transit: 6:30 PM
Moonset: 1:19 AM
Moon Phase: First Quarter
Moon Illumination: 51.1%

Best Times for Fishing or Hunting

Major Periods

7:15 AM - 9:45 AM
6:00 PM - 8:30 PM

Minor Periods

10:06 AM - 11:36 AM
12:49 AM - 2:19 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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