Water Temperature of Difficult Run in McLean, VA
Current Water Temperature
Measurement Time: Wednesday, June 4, 2025, 6:15 PM EDT
Temperature Locations
View Nearby Locations View All Virginia Locations View Locations Near Me
Local Points of Interest
Great Falls Park; Great Falls, VASponsored Content
Station Name: DIFFICULT RUN NEAR GREAT FALLS, VA
Data Source: Water Data - usgc.gov
Elevation Above Sea Level: 184 feet / 56 meters
Nearest Address:
9200 Old Dominion Dr
McLean, VA 22102
Fairfax County
GPS Coordinates: 38.97594346, -77.24581439
Nearby Water Temperatures
Dead Run, McLean, VA (3.9 mi)Difficult Run, Oakton, VA (7.8 mi)
Sligo Creek, Takoma Park, MD (13.0 mi)
Washington Channel, Washington, DC (14.0 mi)
Paint Branch, Calverton, MD (15.6 mi)
Northeast Branch Anacostia River, Riverdale Park, MD (17.2 mi)
Patuxent River, Brighton, MD (19.8 mi)
Potomac River, Point of Rocks, MD (26.0 mi)
Carroll Creek, Frederick, MD (32.5 mi)
Carroll Creek, Frederick, MD (33.5 mi)
Scotts Level Branch, Milford Mill, MD (37.2 mi)
Northwest Harbor, Baltimore, MD (41.0 mi)
Spout Run, Boyce, VA (41.2 mi)
Severn River, Annapolis, MD (41.2 mi)
Chesapeake Bay, Annapolis, MD (42.9 mi)
Weather for McLean, Virginia
Current Weather

Humidity: 70%
Feels Like: 77.4°F
Wind: SSE 6 mph
Wind Gusts: 12.7 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast

Wed
H: 92°F
L: 59°F

Thu
H: 90°F
L: 67°F

Fri
H: 90°F
L: 71°F

Sat
H: 83°F
L: 68°F

Sun
H: 75°F
L: 65°F
Air Quality
Nitrogen Dioxide: 16.47 μg/m3
Sulphur Dioxide: 7.03 μg/m3
Ozone: 78 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:31 PM
Daylight: 14 hrs 47 mins
Moon Transit: 8:32 PM
Moonset: 2:07 AM
Moon Phase: First Quarter
Moon Illumination: 59.8%
Best Times for Fishing or Hunting
Major Periods
9:27 AM - 11:57 AM8:02 PM - 10:32 PM
Minor Periods
1:59 PM - 3:29 PM1:37 AM - 3:07 AM
Action Rating: 3 out of 5
This is only a test for monitoring of vital dissemination systems.
Effective: Wed June 4, 2025, 8:21 PM
Expires: Wed June 4, 2025, 8:31 PM
Monitoring message only. Please disregard.
Monitoring message only. Please disregard.
Air Quality Alert issued June 4 at 4:40PM EDT by NWS Baltimore MD/Washington DC
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed June 4, 2025, 4:40 PM
Expires: Fri June 6, 2025, 12:00 AM
The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Thursday for Northern Baltimore. A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. 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 mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx.
Air Quality Alert issued June 4 at 4:40PM EDT by NWS Baltimore MD/Washington DC
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed June 4, 2025, 4:40 PM
Expires: Fri June 6, 2025, 12:00 AM
The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Thursday for Northern Baltimore. A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. 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 mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx.
Weather Forecast
Average Temperature: 77.3°F
Average Humidity: 63%
Wind: 6.7 mph
UV Index: 2.3
Air Quality
Nitrogen Dioxide: 19.43 μg/m3
Sulphur Dioxide: 8.95 μg/m3
Ozone: 122.48 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:31 PM
Daylight: 14 hrs 47 mins
Moon Transit: 8:32 PM
Moonset: 2:07 AM
Moon Phase: First Quarter
Moon Illumination: 59.8%
Best Times for Fishing or Hunting
Major Periods
9:27 AM - 11:57 AM8:02 PM - 10:32 PM
Minor Periods
1:59 PM - 3:29 PM1:37 AM - 3:07 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 77.9°F
Average Humidity: 61%
Wind: 9.8 mph
UV Index: 2.3
Air Quality
Nitrogen Dioxide: 15.38 μg/m3
Sulphur Dioxide: 7.01 μg/m3
Ozone: 107.88 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:32 PM
Daylight: 14 hrs 48 mins
Moon Transit: 9:11 PM
Moonset: 2:27 AM
Moon Phase: First Quarter
Moon Illumination: 70.6%
Best Times for Fishing or Hunting
Major Periods
10:06 AM - 12:36 AM8:41 PM - 11:11 PM
Minor Periods
2:57 PM - 4:27 PM1:57 AM - 3:27 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 78.7°F
Average Humidity: 68%
Wind: 11.2 mph
UV Index: 2.1
Air Quality
Nitrogen Dioxide: 17.63 μg/m3
Sulphur Dioxide: 5.08 μg/m3
Ozone: 92 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:32 PM
Daylight: 14 hrs 49 mins
Moon Transit: 9:52 PM
Moonset: 2:47 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 80.3%
Best Times for Fishing or Hunting
Major Periods
10:46 AM - 1:16 PM9:22 PM - 11:52 PM
Minor Periods
3:57 PM - 5:27 PM2:17 AM - 3:47 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 73.2°F
Average Humidity: 86%
Wind: 7.4 mph
UV Index: 1.6
Air Quality
Nitrogen Dioxide: 24.09 μg/m3
Sulphur Dioxide: 5.93 μg/m3
Ozone: 77.72 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:33 PM
Daylight: 14 hrs 50 mins
Moon Transit: 10:34 PM
Moonset: 3:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 88.5%
Best Times for Fishing or Hunting
Major Periods
11:28 AM - 1:58 PM12:00 AM - 12:00 AM
Minor Periods
4:57 PM - 6:27 PM2:40 AM - 4:10 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 67.6°F
Average Humidity: 91%
Wind: 6.9 mph
UV Index: 0.7
Air Quality
Nitrogen Dioxide: 34.75 μg/m3
Sulphur Dioxide: 8.71 μg/m3
Ozone: 61.69 μg/m3
Astronomical
Sun Transit: 1:08 PM
Sunset: 8:34 PM
Daylight: 14 hrs 50 mins
Moon Transit: 11:20 PM
Moonset: 3:35 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 94.7%
Best Times for Fishing or Hunting
Major Periods
12:12 AM - 2:42 PM12:00 AM - 12:00 AM
Minor Periods
6:00 PM - 7:30 PM3:05 AM - 4:35 AM
Action Rating: 2 out of 5