Current Conditions

Herndon, Virginia

58°F15°C

Light Rain

Wind

NE 9 mph15 km/h

Humidity

92%

Cloud Cover

100%

As of Wednesday, September 23, 2026 at 1:36 AM EDT

Today's Outlook

Day

Overcast and mild, with a high of 65°F18°C and morning low of 55°F13°C. Breezy from the NE at 9 mph14 km/h. 72% chance of light rain throughout the day.

Night

Overcast, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph14 to 15 km/h. 94% chance of light rain overnight.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Light Rain	High 65°F18°C	Low 55°F13°C	Precip 0.2 in5.1 mm94%	Cloud 89%	Wind NE 9 mph14 km/h	Wednesday: Overcast and mild, with a high of 65°F18°C and morning low of 55°F13°C. Breezy from the NE at 9 mph14 km/h. 72% chance of light rain throughout the day. Wednesday Night: Overcast, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph14 to 15 km/h. 94% chance of light rain overnight.
Partly Cloudy	High 67°F19°C	Low 54°F12°C	Precip 0 in0 mm—	Cloud 80%	Wind NNE 8 mph12 km/h	Thursday: Overcast and mild, with a high of 67°F19°C and morning low of 54°F12°C. Breezy from the NE at 9 to 10 mph14 to 15 km/h. Dry air. Thursday Night: Mostly cloudy, with a low around 55°F13°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h.
Partly Cloudy	High 75°F24°C	Low 51°F10°C	Precip 0 in0.1 mm2%	Cloud 46%	Wind N 9 mph15 km/h	Friday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 52°F11°C. Breezy from the N at 10 to 11 mph16 to 18 km/h. Dry air. Friday Night: Mostly cloudy, with a low around 51°F10°C. Breezy from the NNW at 9 to 10 mph14 to 16 km/h.
Drizzle	High 74°F24°C	Low 57°F14°C	Precip 0.03 in0.8 mm11%	Cloud 37%	Wind NNW 10 mph16 km/h	Saturday: Partly cloudy and warm, with a high of 74°F24°C and morning low of 57°F14°C. Breezy from the NNW at 11 to 12 mph18 to 19 km/h. Dry air. Saturday Night: Partly cloudy, with a low around 57°F14°C. Breezy from the NNW at 10 mph15 km/h. 11% chance of drizzle in the evening.
Drizzle	High 68°F20°C	Low 59°F15°C	Precip 0.11 in2.7 mm29%	Cloud 81%	Wind NW 9 mph15 km/h	Sunday: Overcast and warm, with a high of 68°F20°C and morning low of 59°F15°C. Breezy from the NW at 10 to 11 mph16 to 18 km/h. 29% chance of drizzle throughout the day. Sunday Night: Mostly cloudy, with a low around 60°F15°C. Breezy from the NW at 9 mph14 km/h. 21% chance of drizzle throughout the night.
Partly Cloudy	High 72°F22°C	Low 60°F16°C	Precip 0.02 in0.4 mm9%	Cloud 75%	Wind NW 6 mph10 km/h	Monday: Mostly cloudy and warm, with a high of 72°F22°C and morning low of 60°F16°C. Breezy from the NW at 7 mph11 km/h. Monday Night: Mostly cloudy, with a low around 60°F16°C. Breezy from the NW at 5 to 7 mph9 to 11 km/h.
Partly Cloudy	High 77°F25°C	Low 60°F15°C	Precip 0 in0.1 mm2%	Cloud 42%	Wind WNW 4 mph6 km/h	Tuesday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 60°F15°C. Light wind from the WNW around 3 mph5 km/h. Tuesday Night: Partly cloudy, with a low around 60°F16°C. Light wind from the WSW around 4 mph6 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	65°F18°C	55°F13°C	0.2 in5.1 mm· 94%	89%	Light Rain	NE 9 mph14 km/h
DayOvercast and mild, with a high of 65°F18°C and morning low of 55°F13°C. Breezy from the NE at 9 mph14 km/h. 72% chance of light rain throughout the day. NightOvercast, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph14 to 15 km/h. 94% chance of light rain overnight.
	ThursdaySep 24	67°F19°C	54°F12°C	0 in0 mm· —	80%	Partly Cloudy	NNE 8 mph12 km/h
DayOvercast and mild, with a high of 67°F19°C and morning low of 54°F12°C. Breezy from the NE at 9 to 10 mph14 to 15 km/h. Dry air. NightMostly cloudy, with a low around 55°F13°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h.
	FridaySep 25	75°F24°C	51°F10°C	0 in0.1 mm· 2%	46%	Partly Cloudy	N 9 mph15 km/h
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 52°F11°C. Breezy from the N at 10 to 11 mph16 to 18 km/h. Dry air. NightMostly cloudy, with a low around 51°F10°C. Breezy from the NNW at 9 to 10 mph14 to 16 km/h.
	SaturdaySep 26	74°F24°C	57°F14°C	0.03 in0.8 mm· 11%	37%	Drizzle	NNW 10 mph16 km/h
DayPartly cloudy and warm, with a high of 74°F24°C and morning low of 57°F14°C. Breezy from the NNW at 11 to 12 mph18 to 19 km/h. Dry air. NightPartly cloudy, with a low around 57°F14°C. Breezy from the NNW at 10 mph15 km/h. 11% chance of drizzle in the evening.
	SundaySep 27	68°F20°C	59°F15°C	0.11 in2.7 mm· 29%	81%	Drizzle	NW 9 mph15 km/h
DayOvercast and warm, with a high of 68°F20°C and morning low of 59°F15°C. Breezy from the NW at 10 to 11 mph16 to 18 km/h. 29% chance of drizzle throughout the day. NightMostly cloudy, with a low around 60°F15°C. Breezy from the NW at 9 mph14 km/h. 21% chance of drizzle throughout the night.
	MondaySep 28	72°F22°C	60°F16°C	0.02 in0.4 mm· 9%	75%	Partly Cloudy	NW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 60°F16°C. Breezy from the NW at 7 mph11 km/h. NightMostly cloudy, with a low around 60°F16°C. Breezy from the NW at 5 to 7 mph9 to 11 km/h.
	TuesdaySep 29	77°F25°C	60°F15°C	0 in0.1 mm· 2%	42%	Partly Cloudy	WNW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 60°F15°C. Light wind from the WNW around 3 mph5 km/h. NightPartly cloudy, with a low around 60°F16°C. Light wind from the WSW around 4 mph6 km/h.
	WednesdaySep 30	81°F27°C	59°F15°C	0.02 in0.5 mm· 7%	46%	Partly Cloudy	SSE 5 mph8 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 60°F15°C. Light wind from the SSE around 5 mph8 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the SSE at 5 to 7 mph9 to 11 km/h.
	ThursdayOct 1	79°F26°C	65°F18°C	0.16 in4 mm· 28%	63%	Showers	S 6 mph10 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 65°F18°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 28% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Light wind from the S around 6 mph10 km/h. 20% chance of showers throughout the night.
	FridayOct 2	77°F25°C	63°F17°C	0.15 in3.9 mm· 18%	56%	Showers	WSW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 63°F17°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 63°F17°C. Light wind from the SW around 6 mph10 km/h. 18% chance of showers throughout the night.
	SaturdayOct 3	75°F24°C	60°F16°C	0.11 in2.9 mm· 21%	56%	Showers	SW 6 mph9 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 60°F16°C. Light wind from the WSW around 6 mph9 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Light wind from the SSW around 6 mph9 km/h. 21% chance of drizzle throughout the night.
	SundayOct 4	75°F24°C	61°F16°C	0.16 in4 mm· 23%	62%	Showers	SSW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 61°F16°C. Light wind from the SW around 6 mph10 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Light wind from the SSW around 6 mph10 km/h. 19% chance of drizzle throughout the night.
	MondayOct 5	72°F22°C	60°F15°C	0.2 in5 mm· 26%	56%	Showers	WNW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 60°F15°C. Breezy from the WNW at 7 mph11 km/h. 26% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F16°C. Light wind from the W around 6 mph10 km/h. 22% chance of drizzle throughout the night.
	TuesdayOct 6	71°F22°C	57°F14°C	0.11 in2.8 mm· 18%	49%	Drizzle	WNW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 57°F14°C. Breezy from the WNW at 6 to 7 mph10 to 11 km/h. 17% chance of drizzle throughout the day. NightPartly cloudy, with a low around 57°F14°C. Light wind from the WNW around 6 mph10 km/h. 18% chance of drizzle throughout the night.
	WednesdayOct 7	69°F21°C	55°F13°C	0.11 in2.9 mm· 14%	47%	Showers	WNW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 55°F13°C. Breezy from the WNW at 7 mph11 km/h. 14% chance of showers throughout the day. Dry air. NightPartly cloudy, with a low around 55°F13°C. Light wind from the WNW around 6 mph10 km/h. 11% chance of drizzle throughout the night.

Nearby Cities

Reston2 mi4 km Oak Hill3 mi5 km Sterling3 mi5 km Great Falls6 mi9 km Chantilly6 mi9 km Wolf Trap6 mi9 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.

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Coordinates: 38.9695°N, 77.3861°W·Elevation: 110m·Timezone: America/New_York·Population: 24,568