Water Temperature of Difficult Run in McLean, VA

Current Water Temperature

72.9°F

Measurement Time: Saturday, September 6, 2025, 2:15 PM EDT

Temperature Locations

View Nearby Locations     View All Virginia Locations     View Locations Near Me

Local Points of Interest

Great Falls Park; Great Falls, VA

Sponsored Content

Difficult Run

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

83.6°F
Cloudy
Conditions: Cloudy
Humidity: 58%
Feels Like: 87.1°F
Wind: NNE 6.5 mph
Wind Gusts: 10.3 mph
Pressure: 29.92 in
Precipitation: 0 in
Cloud Cover: 86%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Patchy rain nearby
Sat
H: 93°F
L: 72°F
Overcast
Sun
H: 77°F
L: 66°F
Sunny
Mon
H: 75°F
L: 56°F
Sunny
Tue
H: 81°F
L: 56°F
Overcast
Wed
H: 78°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 11.66 μg/m3
PM10: 11.66 μg/m3
Carbon Monoxide: 852.85 μg/m3
Nitrogen Dioxide: 14.8 μg/m3
Sulphur Dioxide: 5.74 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 1:07 PM
Sunset: 7:31 PM
Daylight: 12 hrs 48 mins
Moonrise: 7:07 PM
Moon Transit: 12:00 AM
Moonset: 5:12 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:31 PM - 4:01 PM

Minor Periods

6:37 PM - 8:07 PM
4:42 AM - 6:12 AM

Action Rating: 3 out of 5

Severe Thunderstorm Watch issued September 6 at 1:25PM EDT until September 6 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Sat September 6, 2025, 1:25 PM
Expires: Sat September 6, 2025, 8:00 PM

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 607 IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 7 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD IN NORTH CENTRAL MARYLAND CARROLL IN NORTHEAST MARYLAND CECIL IN NORTHERN MARYLAND BALTIMORE BALTIMORE CITY HARFORD THIS INCLUDES THE CITIES OF ABERDEEN, ANNAPOLIS, ARNOLD, BALTIMORE, BEL AIR, CATONSVILLE, COLUMBIA, DUNDALK, EDGEWOOD, ELDERSBURG, ELKTON, ELLICOTT CITY, ESSEX, FALLSTON, GLEN BURNIE, HAVRE DE GRACE, JOPPATOWNE, ODENTON, PARKVILLE, PIKESVILLE, RANDALLSTOWN, SEVERN, SEVERNA PARK, SOUTH GATE, TOWSON, AND WESTMINSTER.


Severe Thunderstorm Watch issued September 6 at 1:25PM EDT until September 6 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Sat September 6, 2025, 1:25 PM
Expires: Sat September 6, 2025, 8:00 PM

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 607 IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 7 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD IN NORTH CENTRAL MARYLAND CARROLL IN NORTHEAST MARYLAND CECIL IN NORTHERN MARYLAND BALTIMORE BALTIMORE CITY HARFORD THIS INCLUDES THE CITIES OF ABERDEEN, ANNAPOLIS, ARNOLD, BALTIMORE, BEL AIR, CATONSVILLE, COLUMBIA, DUNDALK, EDGEWOOD, ELDERSBURG, ELKTON, ELLICOTT CITY, ESSEX, FALLSTON, GLEN BURNIE, HAVRE DE GRACE, JOPPATOWNE, ODENTON, PARKVILLE, PIKESVILLE, RANDALLSTOWN, SEVERN, SEVERNA PARK, SOUTH GATE, TOWSON, AND WESTMINSTER.


Severe Thunderstorm Watch issued September 6 at 1:25PM EDT until September 6 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Sat September 6, 2025, 1:25 PM
Expires: Sat September 6, 2025, 8:00 PM

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 607 IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 7 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD IN NORTH CENTRAL MARYLAND CARROLL IN NORTHEAST MARYLAND CECIL IN NORTHERN MARYLAND BALTIMORE BALTIMORE CITY HARFORD THIS INCLUDES THE CITIES OF ABERDEEN, ANNAPOLIS, ARNOLD, BALTIMORE, BEL AIR, CATONSVILLE, COLUMBIA, DUNDALK, EDGEWOOD, ELDERSBURG, ELKTON, ELLICOTT CITY, ESSEX, FALLSTON, GLEN BURNIE, HAVRE DE GRACE, JOPPATOWNE, ODENTON, PARKVILLE, PIKESVILLE, RANDALLSTOWN, SEVERN, SEVERNA PARK, SOUTH GATE, TOWSON, AND WESTMINSTER.


Severe Thunderstorm Watch issued September 6 at 1:25PM EDT until September 6 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Sat September 6, 2025, 1:25 PM
Expires: Sat September 6, 2025, 8:00 PM

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 607 IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 7 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD IN NORTH CENTRAL MARYLAND CARROLL IN NORTHEAST MARYLAND CECIL IN NORTHERN MARYLAND BALTIMORE BALTIMORE CITY HARFORD THIS INCLUDES THE CITIES OF ABERDEEN, ANNAPOLIS, ARNOLD, BALTIMORE, BEL AIR, CATONSVILLE, COLUMBIA, DUNDALK, EDGEWOOD, ELDERSBURG, ELKTON, ELLICOTT CITY, ESSEX, FALLSTON, GLEN BURNIE, HAVRE DE GRACE, JOPPATOWNE, ODENTON, PARKVILLE, PIKESVILLE, RANDALLSTOWN, SEVERN, SEVERNA PARK, SOUTH GATE, TOWSON, AND WESTMINSTER.


Saturday, September 6, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 79.6°F
Average Humidity: 69%
Chance of Rain: 83%
Wind: 13.2 mph
UV Index: 1.4

Air Quality

AQI: 2 - Moderate
PM2.5: 26.6 μg/m3
PM10: 26.91 μg/m3
Carbon Monoxide: 481.81 μg/m3
Nitrogen Dioxide: 20.23 μg/m3
Sulphur Dioxide: 7.42 μg/m3
Ozone: 95.68 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 1:07 PM
Sunset: 7:31 PM
Daylight: 12 hrs 48 mins
Moonrise: 7:07 PM
Moon Transit: 12:00 AM
Moonset: 5:12 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:31 PM - 4:01 PM

Minor Periods

6:37 PM - 8:07 PM
4:42 AM - 6:12 AM

Action Rating: 3 out of 5

Sunday, September 7, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 70.6°F
Average Humidity: 51%
Chance of Rain: 0%
Wind: 7.4 mph
UV Index: 0.7

Air Quality

AQI: 2 - Moderate
PM2.5: 15.68 μg/m3
PM10: 15.89 μg/m3
Carbon Monoxide: 498.46 μg/m3
Nitrogen Dioxide: 14.7 μg/m3
Sulphur Dioxide: 8.72 μg/m3
Ozone: 70.8 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:06 PM
Sunset: 7:29 PM
Daylight: 12 hrs 46 mins
Moonrise: 7:33 PM
Moon Transit: 12:40 AM
Moonset: 6:25 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:10 AM - 2:40 AM
2:20 PM - 4:50 PM

Minor Periods

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

Action Rating: 4 out of 5

Monday, September 8, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 66°F
Average Humidity: 49%
Chance of Rain: 0%
Wind: 5.8 mph
UV Index: 1.7

Air Quality

AQI: 1 - Good
PM2.5: 13.08 μg/m3
PM10: 13.18 μg/m3
Carbon Monoxide: 368.74 μg/m3
Nitrogen Dioxide: 19.4 μg/m3
Sulphur Dioxide: 5.91 μg/m3
Ozone: 74.64 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:06 PM
Sunset: 7:28 PM
Daylight: 12 hrs 43 mins
Moonrise: 7:58 PM
Moon Transit: 3:28 PM
Moonset: 7:37 AM
Moon Phase: Full
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

2:58 PM - 5:28 PM
2:58 PM - 5:28 PM

Minor Periods

7:28 PM - 8:58 PM
7:07 AM - 8:37 AM

Action Rating: 5 out of 5

Tuesday, September 9, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 67.1°F
Average Humidity: 55%
Chance of Rain: 0%
Wind: 9.2 mph
UV Index: 1.6

Air Quality

AQI: 2 - Moderate
PM2.5: 21.22 μg/m3
PM10: 21.76 μg/m3
Carbon Monoxide: 491.8 μg/m3
Nitrogen Dioxide: 39.21 μg/m3
Sulphur Dioxide: 10.7 μg/m3
Ozone: 74.52 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 1:06 PM
Sunset: 7:26 PM
Daylight: 12 hrs 41 mins
Moonrise: 8:24 PM
Moon Transit: 2:17 AM
Moonset: 8:51 AM
Moon Phase: Full
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

1:47 AM - 4:17 AM
3:58 PM - 6:28 PM

Minor Periods

7:54 PM - 9:24 PM
8:21 AM - 9:51 AM

Action Rating: 4 out of 5

Wednesday, September 10, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 66.8°F
Average Humidity: 61%
Chance of Rain: 0%
Wind: 7.2 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 14.83 μg/m3
PM10: 17.02 μg/m3
Carbon Monoxide: 468.76 μg/m3
Nitrogen Dioxide: 34.92 μg/m3
Sulphur Dioxide: 8.07 μg/m3
Ozone: 50.38 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 1:05 PM
Sunset: 7:25 PM
Daylight: 12 hrs 38 mins
Moonrise: 8:53 PM
Moon Transit: 3:08 AM
Moonset: 10:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

2:38 AM - 5:08 AM
4:49 PM - 7:19 PM

Minor Periods

8:23 PM - 9:53 PM
9:36 AM - 11:06 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.

Webcams Near McLean, VA

Sponsored Content