Local weather forecast

Weather in Great Falls, VA

Updated 2026-09-26 10:00 local time · ZIP codes 22066

Cloudy
Now65°F

Cloudy

High / Low71° / 54°
Rain chance57%
Wind14 mph
Weather alerts

Active alerts

2
Small Craft Advisory issued September 26 at 2:35AM EDT until September 27 at 6:00AM EDT by NWS Baltimore MD/Washington DC

* WHAT...North winds 10 to 20 kt with gusts up to 30 kt. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD, and Patapsco River including Baltimore Harbor. * WHEN...Until 6 AM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Safety instructions

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

Small Craft Advisory issued September 26 at 7:45AM EDT until September 27 at 6:00AM EDT by NWS Baltimore MD/Washington DC

* WHAT...North winds 10 to 20 kt with gusts up to 30 kt. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD, and Patapsco River including Baltimore Harbor. * WHEN...Until 6 AM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Safety instructions

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

Hourly

Next hours

NowCloudy65°8% rain
11 AMPartly Cloudy69°3% rain
12 PMOvercast70°10% rain
1 PMOvercast69°10% rain
2 PMOvercast71°11% rain
3 PMOvercast70°11% rain
4 PMPartly Cloudy69°6% rain
5 PMOvercast68°12% rain
6 PMLight drizzle62°42% rain
7 PMLight rain60°63% rain
8 PMLight drizzle59°48% rain
9 PMOvercast60°26% rain
Forecast

3-day weather forecast

Today2026-09-26
Sunny
71° 54°Sunny
Rain 57%Gust 15 mph
Tomorrow2026-09-27
Overcast
71° 57°Overcast
Rain 48%Gust 16 mph
Monday2026-09-28
Overcast
68° 58°Overcast
Rain 24%Gust 10 mph
Conditions

Weather details

Feels like56°F
Humidity51%
Pressure29.95 inHg
Visibility6 mi
Wind14 mph N
Wind gusts28 mph
Precipitation0.00 in
UV index2
Daylight

Sunrise, sunset and moon

Sunrise07:00 AM
Sunset07:00 PM
Moonrise06:50 PM
Moon phaseFull Moon
Next 24 hours

Key weather changes ahead

Warmest hour2 PM · 71°F
Coolest hour8 PM · 59°F
Highest rain chance7 PM · 63%
Strongest gusts10 AM · 28 mph
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 63% over the next 12 hours.

Light layers should work

It feels like 56°F with winds near 14 mph.

Best window: 4 PM

69°F, 6% rain chance and 11 mph wind.

Use extra caution while driving

Visibility is around 6 mi; gusts may reach 28 mph.

Running conditions are less comfortable

Current temperature is 65°F, wind 14 mph, rain chance up to 63%.

Low UV protection needs

UV index is 2.

Local weather characteristics in Great Falls

Virginia ranges from Atlantic coastal plain to Appalachian highlands. Summers are generally warm and humid, while mountain areas are cooler and winter conditions vary substantially statewide.

Great Falls is part of the South weather region. The forecast point is near 39.00°N latitude and 77.29°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.

Great Falls weather today

Cloudy and 65°F in Great Falls, VA. Today's high is 71°F with a 57% rain chance. Winds are around 14 mph with gusts near 28 mph. Relative humidity is 51%, pressure is 29.95 inHg, and visibility is about 6 miles.

Tonight and tomorrow in Great Falls

Sunrise is at 07:00 AM and sunset is at 07:00 PM. Tomorrow's forecast calls for Overcast with a high near 71°F and a low near 57°F. The maximum rain chance is 48%.

Nearby

Weather near Great Falls

Virginia

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