Current Conditions

Great Falls, Virginia

84°F29°C

Clear

Wind

ENE 2 mph3 km/h

Humidity

27%

Cloud Cover

As of Thursday, July 23, 2026 at 5:00 PM EDT

Today's Outlook

Day

Mostly clear and warm, with a high of 84°F29°C. Light wind from the NE around 2 mph4 km/h. Dry air.

Night

Mostly clear, with a low around 68°F20°C. Light wind from the SE around 4 mph6 km/h.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
ThursdayJul 23	Clear	High 84°F29°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 3%	Wind E 3 mph5 km/h	Thursday: Mostly clear and warm, with a high of 84°F29°C. Light wind from the NE around 2 mph4 km/h. Dry air. Thursday Night: Mostly clear, with a low around 68°F20°C. Light wind from the SE around 4 mph6 km/h.
FridayJul 24	Partly Cloudy	High 83°F28°C	Low 61°F16°C	Precip 0 in0 mm—	Cloud 71%	Wind ESE 5 mph7 km/h	Friday: Overcast and warm, with a high of 83°F28°C and morning low of 68°F20°C. Light wind from the ESE around 5 mph8 km/h. Friday Night: Mostly cloudy, with a low around 61°F16°C. Light wind from the SE around 4 mph7 km/h.
SaturdayJul 25	Partly Cloudy	High 84°F29°C	Low 65°F19°C	Precip 0.01 in0.2 mm6%	Cloud 44%	Wind ESE 4 mph6 km/h	Saturday: Partly cloudy and warm, with a high of 84°F29°C and morning low of 70°F21°C. Light wind from the E around 3 mph5 km/h. Saturday Night: Partly cloudy, with a low around 65°F19°C. Light wind from the SE around 4 mph7 km/h.
SundayJul 26	Drizzle	High 90°F32°C	Low 67°F19°C	Precip 0.03 in0.7 mm30%	Cloud 37%	Wind SSW 3 mph5 km/h	Sunday: Partly cloudy and hot, with a high of 90°F32°C and morning low of 72°F22°C. Light wind from the W around 2 mph4 km/h. Sunday Night: Partly cloudy, with a low around 67°F19°C. Light wind from the S around 4 mph6 km/h. 30% chance of drizzle in the evening.
MondayJul 27	Drizzle	High 91°F33°C	Low 70°F21°C	Precip 0.06 in1.4 mm25%	Cloud 60%	Wind WSW 4 mph7 km/h	Monday: Mostly cloudy and hot, with a high of 91°F33°C and morning low of 74°F24°C. Light wind from the W around 4 mph6 km/h. 22% chance of drizzle in the afternoon. Monday Night: Mostly cloudy, with a low around 70°F21°C. Light wind from the SW around 5 mph7 km/h. 25% chance of drizzle in the evening.
TuesdayJul 28	Showers	High 88°F31°CFeels 91°F33°C	Low 74°F23°C	Precip 0.25 in6.3 mm57%	Cloud 65%	Wind WSW 5 mph9 km/h	Tuesday: Mostly cloudy and hot, with a high of 88°F31°C and morning low of 76°F24°C. Light wind from the WSW around 6 mph9 km/h. 57% chance of light rain throughout the day. Humid. Tuesday Night: Mostly cloudy, with a low around 74°F23°C. Light wind from the SW around 5 mph8 km/h. 51% chance of showers throughout the night.
WednesdayJul 29	Drizzle	High 88°F31°C	Low 71°F22°C	Precip 0.09 in2.3 mm18%	Cloud 33%	Wind NW 7 mph11 km/h	Wednesday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 74°F23°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. 13% chance of drizzle throughout the day. Wednesday Night: Partly cloudy, with a low around 71°F22°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 18% chance of drizzle throughout the night.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	ThursdayJul 23	84°F29°C	68°F20°C	0 in0 mm· —	3%	Clear	E 3 mph5 km/h
DayMostly clear and warm, with a high of 84°F29°C. Light wind from the NE around 2 mph4 km/h. Dry air. NightMostly clear, with a low around 68°F20°C. Light wind from the SE around 4 mph6 km/h.
	FridayJul 24	83°F28°C	61°F16°C	0 in0 mm· —	71%	Partly Cloudy	ESE 5 mph7 km/h
DayOvercast and warm, with a high of 83°F28°C and morning low of 68°F20°C. Light wind from the ESE around 5 mph8 km/h. NightMostly cloudy, with a low around 61°F16°C. Light wind from the SE around 4 mph7 km/h.
	SaturdayJul 25	84°F29°C	65°F19°C	0.01 in0.2 mm· 6%	44%	Partly Cloudy	ESE 4 mph6 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 70°F21°C. Light wind from the E around 3 mph5 km/h. NightPartly cloudy, with a low around 65°F19°C. Light wind from the SE around 4 mph7 km/h.
	SundayJul 26	90°F32°C	67°F19°C	0.03 in0.7 mm· 30%	37%	Drizzle	SSW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 72°F22°C. Light wind from the W around 2 mph4 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the S around 4 mph6 km/h. 30% chance of drizzle in the evening.
	MondayJul 27	91°F33°C	70°F21°C	0.06 in1.4 mm· 25%	60%	Drizzle	WSW 4 mph7 km/h
DayMostly cloudy and hot, with a high of 91°F33°C and morning low of 74°F24°C. Light wind from the W around 4 mph6 km/h. 22% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 70°F21°C. Light wind from the SW around 5 mph7 km/h. 25% chance of drizzle in the evening.
	TuesdayJul 28	88°F31°C Feels 91°F33°C	74°F23°C	0.25 in6.3 mm· 57%	65%	Showers	WSW 5 mph9 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 76°F24°C. Light wind from the WSW around 6 mph9 km/h. 57% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 74°F23°C. Light wind from the SW around 5 mph8 km/h. 51% chance of showers throughout the night.
	WednesdayJul 29	88°F31°C	71°F22°C	0.09 in2.3 mm· 18%	33%	Drizzle	NW 7 mph11 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 74°F23°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F22°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 18% chance of drizzle throughout the night.
	ThursdayJul 30	89°F32°C	69°F21°C	0.02 in0.4 mm· 8%	28%	Clear	NW 6 mph9 km/h
DayPartly cloudy and hot, with a high of 89°F32°C and morning low of 72°F22°C. Light wind from the NNW around 6 mph10 km/h. NightMostly clear, with a low around 69°F21°C. Light wind from the NW around 6 mph9 km/h.
	FridayJul 31	91°F33°C	69°F20°C	0.04 in1 mm· 14%	38%	Drizzle	W 5 mph7 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 73°F23°C. Light wind from the WNW around 4 mph7 km/h. 12% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 69°F20°C. Light wind from the WSW around 5 mph8 km/h. 14% chance of drizzle in the evening.
	SaturdayAug 1	91°F33°C	70°F21°C	0.07 in1.9 mm· 27%	46%	Showers	SW 5 mph7 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 74°F23°C. Light wind from the WSW around 4 mph7 km/h. 26% chance of showers throughout the day. NightPartly cloudy, with a low around 70°F21°C. Light wind from the SSW around 5 mph8 km/h. 27% chance of showers in the evening.
	SundayAug 2	92°F33°C	71°F22°C	0.06 in1.5 mm· 22%	50%	Drizzle	SW 5 mph8 km/h
DayMostly cloudy and hot, with a high of 92°F33°C and morning low of 75°F24°C. Light wind from the WSW around 5 mph7 km/h. 22% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F22°C. Light wind from the SSW around 5 mph8 km/h. 19% chance of drizzle throughout the night.
	MondayAug 3	92°F34°C	72°F22°C	0.06 in1.6 mm· 28%	50%	Drizzle	SW 5 mph8 km/h
DayMostly cloudy and hot, with a high of 92°F34°C and morning low of 75°F24°C. Light wind from the WSW around 5 mph7 km/h. 28% chance of drizzle throughout the day. NightPartly cloudy, with a low around 72°F22°C. Light wind from the SSW around 5 mph8 km/h. 21% chance of drizzle throughout the night.
	TuesdayAug 4	92°F33°C	73°F23°C	0.09 in2.2 mm· 25%	57%	Showers	SW 5 mph8 km/h
DayMostly cloudy and hot, with a high of 92°F33°C and morning low of 77°F25°C. Light wind from the WSW around 5 mph8 km/h. 25% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 73°F23°C. Light wind from the SSW around 5 mph8 km/h. 19% chance of drizzle throughout the night.
	WednesdayAug 5	92°F34°C	74°F23°C	0.08 in2.1 mm· 27%	57%	Showers	WSW 5 mph8 km/h
DayMostly cloudy and hot, with a high of 92°F34°C and morning low of 77°F25°C. Light wind from the WSW around 5 mph8 km/h. 27% chance of showers in the afternoon. Humid. NightMostly cloudy, with a low around 74°F23°C. Light wind from the SW around 5 mph9 km/h. 24% chance of showers throughout the night.
	ThursdayAug 6	91°F33°C	74°F23°C	0.11 in2.8 mm· 30%	60%	Showers	WSW 5 mph8 km/h
DayMostly cloudy and hot, with a high of 91°F33°C and morning low of 76°F25°C. Light wind from the W around 5 mph8 km/h. 30% chance of showers throughout the day. NightMostly cloudy, with a low around 74°F23°C. Light wind from the SW around 5 mph8 km/h. 26% chance of showers throughout the night.

Nearby Cities

Reston3 mi6 km Wolf Trap4 mi6 km Potomac4 mi7 km Herndon6 mi9 km North Potomac6 mi10 km Tysons6 mi10 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 38.9982°N, 77.2883°W·Elevation: 104m·Timezone: America/New_York·Population: 15,427