Current Conditions

Chantilly, Virginia

68°F20°C

Clear

Wind

NW 7 mph11 km/h

Humidity

79%

Cloud Cover

As of Monday, October 12, 2026 at 7:25 PM EDT

Today's Outlook

Night

Mostly clear, with a low around 62°F17°C. Breezy from the NW at 6 to 7 mph10 to 12 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 74°F23°C	Low 62°F17°C	Precip 0 in0 mm—	Cloud 36%	Wind NW 8 mph12 km/h	Monday: Mostly cloudy and warm, with a high of 74°F23°C. Breezy from the NW at 10 to 11 mph15 to 17 km/h. Monday Night: Mostly clear, with a low around 62°F17°C. Breezy from the NW at 6 to 7 mph10 to 12 km/h.
Clear	High 83°F28°C	Low 55°F13°C	Precip 0 in0 mm—	Cloud 3%	Wind SW 7 mph11 km/h	Tuesday: Mostly clear and warm, with a high of 83°F28°C and morning low of 55°F13°C. Breezy from the SSW at 6 to 8 mph10 to 14 km/h. Tuesday Night: Mostly clear, with a low around 56°F13°C. Breezy from the SW at 7 to 9 mph11 to 15 km/h.
Drizzle	High 88°F31°CFeels 91°F33°C	Low 66°F19°C	Precip 0.01 in0.3 mm14%	Cloud 22%	Wind WSW 6 mph10 km/h	Wednesday: Mostly clear and hot, with a high of 88°F31°C and morning low of 66°F19°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. Wednesday Night: Partly cloudy, with a low around 66°F19°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. 14% chance of drizzle in the evening.
Light Rain	High 74°F23°C	Low 61°F16°C	Precip 0.27 in6.9 mm64%	Cloud 95%	Wind NE 7 mph11 km/h	Thursday: Overcast and mild, with a high of 67°F19°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h. 64% chance of light rain in the morning. Thursday Night: Overcast, with a low around 61°F16°C. Breezy from the NE at 7 to 8 mph11 to 13 km/h. 51% chance of light rain overnight.
Light Rain	High 76°F25°C	Low 60°F15°C	Precip 0.17 in4.3 mm56%	Cloud 70%	Wind WSW 10 mph17 km/h	Friday: Mostly cloudy and warm, with a high of 76°F25°C and morning low of 62°F17°C. Breezy from the SW at 10 to 12 mph17 to 20 km/h. 56% chance of showers in the morning. Friday Night: Mostly cloudy, with a low around 60°F15°C. Breezy from the W at 10 to 13 mph17 to 21 km/h. 45% chance of light rain overnight.
Drizzle	High 59°F15°C	Low 44°F7°CFeels 40°F4°C	Precip 0.04 in0.9 mm16%	Cloud 27%	Wind NW 11 mph18 km/h	Saturday: Partly cloudy and mild, with a high of 55°F13°C and morning low of 49°F9°C. Breezy from the NW at 12 mph19 km/h. Dry air. Saturday Night: Partly cloudy, with a low around 44°F7°C. Breezy from the NW at 11 to 14 mph17 to 22 km/h. 16% chance of drizzle overnight.
Clear	High 60°F15°C	Low 38°F3°CFeels 33°F1°C	Precip 0.06 in1.6 mm7%	Cloud 12%	Wind WSW 7 mph11 km/h	Sunday: Mostly clear and mild, with a high of 60°F15°C and morning low of 38°F3°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. Dry air. Sunday Night: Mostly clear, with a low around 38°F4°C. Breezy from the SW at 7 mph11 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	MondayOct 12	74°F23°C	62°F17°C	0 in0 mm· —	36%	Clear	NW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 74°F23°C. Breezy from the NW at 10 to 11 mph15 to 17 km/h. NightMostly clear, with a low around 62°F17°C. Breezy from the NW at 6 to 7 mph10 to 12 km/h.
	TuesdayOct 13	83°F28°C	55°F13°C	0 in0 mm· —	3%	Clear	SW 7 mph11 km/h
DayMostly clear and warm, with a high of 83°F28°C and morning low of 55°F13°C. Breezy from the SSW at 6 to 8 mph10 to 14 km/h. NightMostly clear, with a low around 56°F13°C. Breezy from the SW at 7 to 9 mph11 to 15 km/h.
	WednesdayOct 14	88°F31°C Feels 91°F33°C	66°F19°C	0.01 in0.3 mm· 14%	22%	Drizzle	WSW 6 mph10 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 66°F19°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. NightPartly cloudy, with a low around 66°F19°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. 14% chance of drizzle in the evening.
	ThursdayOct 15	74°F23°C	61°F16°C	0.27 in6.9 mm· 64%	95%	Light Rain	NE 7 mph11 km/h
DayOvercast and mild, with a high of 67°F19°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h. 64% chance of light rain in the morning. NightOvercast, with a low around 61°F16°C. Breezy from the NE at 7 to 8 mph11 to 13 km/h. 51% chance of light rain overnight.
	FridayOct 16	76°F25°C	60°F15°C	0.17 in4.3 mm· 56%	70%	Light Rain	WSW 10 mph17 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 62°F17°C. Breezy from the SW at 10 to 12 mph17 to 20 km/h. 56% chance of showers in the morning. NightMostly cloudy, with a low around 60°F15°C. Breezy from the W at 10 to 13 mph17 to 21 km/h. 45% chance of light rain overnight.
	SaturdayOct 17	59°F15°C	44°F7°C Feels 40°F4°C	0.04 in0.9 mm· 16%	27%	Drizzle	NW 11 mph18 km/h
DayPartly cloudy and mild, with a high of 55°F13°C and morning low of 49°F9°C. Breezy from the NW at 12 mph19 km/h. Dry air. NightPartly cloudy, with a low around 44°F7°C. Breezy from the NW at 11 to 14 mph17 to 22 km/h. 16% chance of drizzle overnight.
	SundayOct 18	60°F15°C	38°F3°C Feels 33°F1°C	0.06 in1.6 mm· 7%	12%	Clear	WSW 7 mph11 km/h
DayMostly clear and mild, with a high of 60°F15°C and morning low of 38°F3°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. Dry air. NightMostly clear, with a low around 38°F4°C. Breezy from the SW at 7 mph11 km/h.
	MondayOct 19	63°F17°C	41°F5°C Feels 36°F2°C	0.08 in2 mm· 10%	40%	Drizzle	SSE 7 mph12 km/h
DayPartly cloudy and mild, with a high of 63°F17°C and morning low of 41°F5°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. 10% chance of drizzle in the morning. Dry air. NightPartly cloudy, with a low around 41°F5°C. Breezy from the SSE at 7 mph12 km/h. 10% chance of drizzle overnight.
	TuesdayOct 20	67°F19°C	48°F9°C Feels 45°F7°C	0.05 in1.2 mm· 14%	47%	Drizzle	SSW 6 mph9 km/h
DayPartly cloudy and mild, with a high of 67°F19°C and morning low of 48°F9°C. Light wind from the WSW around 6 mph9 km/h. 11% chance of drizzle in the morning. Dry air. NightPartly cloudy, with a low around 48°F9°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 14% chance of drizzle overnight.
	WednesdayOct 21	68°F20°C	50°F10°C	0.02 in0.4 mm· 4%	34%	Clear	SE 6 mph9 km/h
DayPartly cloudy and warm, with a high of 68°F20°C and morning low of 50°F10°C. Light wind from the N around 6 mph9 km/h. Dry air. NightPartly cloudy, with a low around 50°F10°C. Light wind from the SSE around 6 mph10 km/h.
	ThursdayOct 22	68°F20°C	51°F11°C	0.02 in0.5 mm· 9%	45%	Partly Cloudy	SSW 6 mph10 km/h
DayMostly cloudy and mild, with a high of 68°F20°C and morning low of 51°F11°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. NightPartly cloudy, with a low around 51°F11°C. Breezy from the S at 6 to 7 mph10 to 11 km/h.
	FridayOct 23	68°F20°C	54°F12°C	0.04 in1.1 mm· 8%	47%	Partly Cloudy	WSW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 68°F20°C and morning low of 54°F12°C. Breezy from the W at 7 mph11 km/h. NightPartly cloudy, with a low around 54°F12°C. Breezy from the WSW at 7 mph11 km/h.
	SaturdayOct 24	67°F19°C	52°F11°C	0.04 in0.9 mm· 7%	49%	Partly Cloudy	WSW 7 mph10 km/h
DayPartly cloudy and mild, with a high of 67°F19°C and morning low of 52°F11°C. Light wind from the W around 6 mph10 km/h. Dry air. NightMostly cloudy, with a low around 52°F11°C. Breezy from the WSW at 7 mph11 km/h.
	SundayOct 25	66°F19°C	52°F11°C	0.09 in2.2 mm· 17%	60%	Showers	WSW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 52°F11°C. Breezy from the W at 7 mph11 km/h. 11% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 53°F12°C. Breezy from the WSW at 7 mph11 km/h. 17% chance of showers overnight.
	MondayOct 26	63°F17°C	51°F11°C	0.13 in3.4 mm· 16%	57%	Showers	W 7 mph11 km/h
DayMostly cloudy and mild, with a high of 63°F17°C and morning low of 51°F11°C. Breezy from the W at 7 to 8 mph12 to 12 km/h. 13% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 52°F11°C. Breezy from the W at 7 mph11 km/h. 16% chance of showers overnight.

Nearby Cities

Oak Hill3 mi4 km Centreville4 mi6 km South Riding4 mi7 km Herndon6 mi9 km Reston7 mi11 km Oakton7 mi11 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: 38.8943°N, 77.4311°W·Elevation: 98m·Timezone: America/New_York·Population: 23,039