Water Temperature of Difficult Run in Oakton, VA

Current Water Temperature

55.0°F

Measurement Time: Monday, April 20, 2026, 4:15 AM EDT

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

46.9°F
Light rain
Light rain
41.3°F
47.7°F
63%
NW 13 mph
15.3 mph
42.8°F
32°F
0 in
75%
9 mi
1022 mbar
1.4

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 55°F
L: 40°F
Sunny
Tue
H: 61°F
L: 34°F
Patchy rain nearby
Wed
H: 65°F
L: 48°F
Sunny
Thu
H: 73°F
L: 50°F
Patchy rain nearby
Fri
H: 76°F
L: 54°F

Air Quality

AQI: 2 - Moderate
PM2.5: 3.65 μg/m3
PM10: 3.95 μg/m3
Carbon Monoxide: 175.85 μg/m3
Nitrogen Dioxide: 3.35 μg/m3
Sulphur Dioxide: 3.65 μg/m3
Ozone: 102 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:08 PM
Sunset: 7:51 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:18 AM
Moon Transit: 4:16 PM
Moonset: 12:06 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

4:59 AM - 7:29 AM
3:46 PM - 6:16 PM

Minor Periods

7:48 AM - 9:18 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Freeze Warning issued April 19 at 11:35PM EDT until April 21 at 10:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Sun April 19, 2026, 11:35 PM
Expires: Mon April 20, 2026, 7:45 AM

* WHAT...Sub-freezing temperatures as low as 30 expected, especially in outlying areas away from larger bodies of water. * WHERE...Portions of DC, central, northern, and southern Maryland, and central and northern Virginia. * WHEN...From 2 AM to 10 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued April 19 at 11:35PM EDT until April 21 at 10:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Sun April 19, 2026, 11:35 PM
Expires: Mon April 20, 2026, 7:45 AM

* WHAT...Sub-freezing temperatures as low as 26 to 30 degrees expected. * WHERE...Portions of central, north central, northeast, and northern Maryland, central, northern, northwest, and western Virginia, and panhandle West Virginia. * WHEN...From 2 AM to 10 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


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

Effective: Mon April 20, 2026, 8:29 AM
Expires: Mon April 20, 2026, 8:39 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Monday, April 20, 2026

Weather Forecast

Patchy rain nearby
55.4°F
40.3°F
46.8°F
48%
0.01 in
79%
0%
14.1 mph
5.8


Air Quality

AQI: 1 - Good
PM2.5: 7.07 μg/m3
PM10: 7.47 μg/m3
Carbon Monoxide: 201.21 μg/m3
Nitrogen Dioxide: 13.2 μg/m3
Sulphur Dioxide: 4.4 μg/m3
Ozone: 84.04 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:08 PM
Sunset: 7:51 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:18 AM
Moon Transit: 4:16 PM
Moonset: 12:06 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

4:59 AM - 7:29 AM
3:46 PM - 6:16 PM

Minor Periods

7:48 AM - 9:18 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, April 21, 2026

Weather Forecast

Sunny
60.8°F
33.9°F
47.2°F
44%
0 in
0%
0%
8.9 mph
6.7


Air Quality

AQI: 1 - Good
PM2.5: 7 μg/m3
PM10: 7.37 μg/m3
Carbon Monoxide: 183.37 μg/m3
Nitrogen Dioxide: 14.07 μg/m3
Sulphur Dioxide: 5.83 μg/m3
Ozone: 78.16 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:08 PM
Sunset: 7:52 PM
Daylight: 13 hrs 28 mins
Moonrise: 9:19 AM
Moon Transit: 5:21 PM
Moonset: 12:19 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

6:04 AM - 8:34 AM
4:51 PM - 7:21 PM

Minor Periods

8:49 AM - 10:19 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, April 22, 2026

Weather Forecast

Patchy rain nearby
65.3°F
47.8°F
55.5°F
73%
0.14 in
86%
0%
9.2 mph
3.7


Air Quality

AQI: 1 - Good
PM2.5: 8.82 μg/m3
PM10: 10.32 μg/m3
Carbon Monoxide: 213.65 μg/m3
Nitrogen Dioxide: 12.86 μg/m3
Sulphur Dioxide: 4.97 μg/m3
Ozone: 96.88 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:07 PM
Sunset: 7:53 PM
Daylight: 13 hrs 30 mins
Moonrise: 10:29 AM
Moon Transit: 6:23 PM
Moonset: 1:20 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

7:08 AM - 9:38 AM
5:53 PM - 8:23 PM

Minor Periods

9:59 AM - 11:29 AM
12:50 AM - 2:20 AM

Action Rating: 3 out of 5

Thursday, April 23, 2026

Weather Forecast

Sunny
72.6°F
50°F
61.1°F
65%
0 in
0%
0%
7.2 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 13.78 μg/m3
PM10: 15.87 μg/m3
Carbon Monoxide: 259.52 μg/m3
Nitrogen Dioxide: 20.79 μg/m3
Sulphur Dioxide: 6.17 μg/m3
Ozone: 83.84 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 1:07 PM
Sunset: 7:54 PM
Daylight: 13 hrs 32 mins
Moonrise: 11:42 AM
Moon Transit: 7:21 PM
Moonset: 2:11 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

8:08 AM - 10:38 AM
6:51 PM - 9:21 PM

Minor Periods

11:12 AM - 12:42 AM
1:41 AM - 3:11 AM

Action Rating: 2 out of 5

Friday, April 24, 2026

Weather Forecast

Patchy rain nearby
75.8°F
54.2°F
62.6°F
63%
0.03 in
84%
0%
6.5 mph
0.5


Air Quality

AQI: 2 - Moderate
PM2.5: 15.87 μg/m3
PM10: 17.8 μg/m3
Carbon Monoxide: 305.78 μg/m3
Nitrogen Dioxide: 34.82 μg/m3
Sulphur Dioxide: 7.69 μg/m3
Ozone: 58.69 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 1:07 PM
Sunset: 7:55 PM
Daylight: 13 hrs 35 mins
Moonrise: 12:55 AM
Moon Transit: 8:14 PM
Moonset: 2:50 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

9:03 AM - 11:33 AM
7:44 PM - 10:14 PM

Minor Periods

12:25 AM - 1:55 PM
2:20 AM - 3:50 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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