Water Temperature of Difficult Run in Oakton, VA

Current Water Temperature

78.4°F

Measurement Time: Friday, July 17, 2026, 1:15 PM 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

90°F
Overcast
Overcast
90.5°F
96.3°F
40%
NE 3.6 mph
4.4 mph
93.7°F
62.9°F
0 in
100%
1 mi
1017 mbar
0.3

Five Day Weather Forecast

Smoky haze
Fri
H: 94°F
L: 70°F
Sunny
Sat
H: 91°F
L: 73°F
Sunny
Sun
H: 86°F
L: 72°F
Sunny
Mon
H: 86°F
L: 66°F
Patchy rain nearby
Tue
H: 90°F
L: 69°F

Air Quality

AQI: 1 - Good
PM2.5: 40.6 μg/m3
PM10: 42.1 μg/m3
Carbon Monoxide: 184 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 2.6 μg/m3
Ozone: 184 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:15 PM
Sunset: 8:33 PM
Daylight: 14 hrs 35 mins
Moonrise: 9:39 AM
Moon Transit: 4:17 PM
Moonset: 10:44 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

5:08 AM - 7:38 AM
3:47 PM - 6:17 PM

Minor Periods

10:14 PM - 11:44 PM
9:09 AM - 10:39 AM

Action Rating: 2 out of 5

Air Quality Alert issued July 17 at 9:45AM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 17, 2026, 9:45 AM
Expires: Sat July 18, 2026, 12:00 AM

The Virginia Department of Environmental Quality has issued a Code PURPLE Air Quality Alert Friday for Northern Virginia. A Code Purple Air Quality Alert means that air pollution concentrations within the region are very unhealthy for the general population. The risk of health effects is increased for everyone. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles visit the web site Virginia DEQ air quality web site at www.deq.virginia.gov


Air Quality Alert issued July 17 at 8:30AM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 17, 2026, 8:30 AM
Expires: Sat July 18, 2026, 12:00 AM

The Virginia Department of Environmental Quality has issued a Code RED Air Quality Alert Friday for Northern Virginia. A Code Red Air Quality Alert means that air pollution concentrations within the region are unhealthy for the general population. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles visit the web site Virginia DEQ air quality web site at www.deq.virginia.gov


Air Quality Alert issued July 16 at 5:10PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu July 16, 2026, 5:10 PM
Expires: Sat July 18, 2026, 12:00 AM

The Virginia Department of Environmental Quality has issued a Code RED Air Quality Alert Friday for Northern Virginia. A Code Red Air Quality Alert means that air pollution concentrations within the region are unhealthy for the general population. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles visit the web site Virginia DEQ air quality web site at www.deq.virginia.gov


Air Quality Alert issued July 16 at 4:40PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu July 16, 2026, 4:40 PM
Expires: Sat July 18, 2026, 12:00 AM

The Virginia Department of Environmental Quality has issued a Code RED Air Quality Alert Friday for Northern Virginia. A Code Red Air Quality Alert means that air pollution concentrations within the region are unhealthy for the general population. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles visit the web site Virginia DEQ air quality web site at www.deq.virginia.gov
Friday, July 17, 2026

Weather Forecast

Smoky haze
94.3°F
70.3°F
82.5°F
54%
0 in
2%
0%
7.6 mph
1.2


Air Quality

AQI: 2 - Moderate
PM2.5: 35.42 μg/m3
PM10: 36.55 μg/m3
Carbon Monoxide: 178.58 μg/m3
Nitrogen Dioxide: 13.3 μg/m3
Sulphur Dioxide: 2.46 μg/m3
Ozone: 113.33 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:15 PM
Sunset: 8:33 PM
Daylight: 14 hrs 35 mins
Moonrise: 9:39 AM
Moon Transit: 4:17 PM
Moonset: 10:44 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

5:08 AM - 7:38 AM
3:47 PM - 6:17 PM

Minor Periods

10:14 PM - 11:44 PM
9:09 AM - 10:39 AM

Action Rating: 2 out of 5

Saturday, July 18, 2026

Weather Forecast

Sunny
91.4°F
73.3°F
80.3°F
75%
0.43 in
74%
0%
6.7 mph
8.4


Air Quality

AQI: 2 - Moderate
PM2.5: 27.95 μg/m3
PM10: 29.43 μg/m3
Carbon Monoxide: 169.29 μg/m3
Nitrogen Dioxide: 11.02 μg/m3
Sulphur Dioxide: 2 μg/m3
Ozone: 98.5 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:15 PM
Sunset: 8:32 PM
Daylight: 14 hrs 34 mins
Moonrise: 10:48 AM
Moon Transit: 5:03 PM
Moonset: 11:07 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

5:55 AM - 8:25 AM
4:33 PM - 7:03 PM

Minor Periods

12:00 AM - 12:00 AM
10:18 AM - 11:48 AM

Action Rating: 3 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
86.2°F
72.1°F
77.7°F
70%
0.08 in
57%
0%
9.4 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 8.87 μg/m3
PM10: 8.96 μg/m3
Carbon Monoxide: 169.52 μg/m3
Nitrogen Dioxide: 8.13 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 88.42 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:15 PM
Sunset: 8:32 PM
Daylight: 14 hrs 32 mins
Moonrise: 11:54 AM
Moon Transit: 5:46 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

6:39 AM - 9:09 AM
5:16 PM - 7:46 PM

Minor Periods

11:24 AM - 12:54 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
86.3°F
66.2°F
75.9°F
58%
0 in
5%
0%
9.8 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 11.86 μg/m3
PM10: 11.92 μg/m3
Carbon Monoxide: 287.96 μg/m3
Nitrogen Dioxide: 15.37 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 79.17 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:15 PM
Sunset: 8:31 PM
Daylight: 14 hrs 31 mins
Moonrise: 12:58 AM
Moon Transit: 6:30 PM
Moonset: 12:30 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:22 AM - 9:52 AM
6:00 PM - 8:30 PM

Minor Periods

12:28 AM - 1:58 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Patchy rain nearby
89.5°F
69.2°F
75.6°F
84%
0.74 in
83%
0%
10.3 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 11.5 μg/m3
PM10: 12.43 μg/m3
Carbon Monoxide: 286 μg/m3
Nitrogen Dioxide: 13.97 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 61.56 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:15 PM
Sunset: 8:30 PM
Daylight: 14 hrs 29 mins
Moonrise: 2:01 PM
Moon Transit: 7:14 PM
Moonset: 12:54 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:06 AM - 10:36 AM
6:44 PM - 9:14 PM

Minor Periods

1:31 PM - 3:01 PM
12:00 AM - 12:00 AM

Action Rating: 2 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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