Observed 7:10 AM EDT at KIAD

Vienna, VA weather

Clear and 37°3°.

Mostly agree

Now 37°3°

Clear

Wind: Calm; Up to 5 mph8 km/h through 7 PM
Dew point: 36°2°; Comfortable
Humidity: 93%; Air 37°3°, dew point 36°2° · fog or dew likely
UV index: 0Low; Moderate 12–3 PM · peak 4
Air quality: 48Good; PM2.5 (fine particles) · tomorrow moderate
Pressure: 30.52 inHg1034 hPa; Rising slowly · +0.04 inHg+1.3 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Above 50°10° today by 10 AM
High 63°17° today at 3 PM
Below 50°10° tonight after 9 PM
Fog tonight 1–2 AM

This morningUp to 56°13° by 11 AM · Clear
This afternoonUp to 63°17° by 3 PM · Clear
TonightDown to 39°4° by 5 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 66°19° by 3 PM · Clear
Tomorrow nightDown to 41°5° by 5 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 7a	Sunny	39°4° (likely 37°3° to 42°6°)	39°4°	0%	2 mph3 km/h from NE, gusts 5 mph9 km/h	100%	12%	0
Sat 8a	Sunny	39°4° (likely 37°3° to 42°6°)	37°3°	0%	3 mph5 km/h from N, gusts 5 mph8 km/h	100%	15%	0
Sat 9a	Sunny	45°7° (likely 42°6° to 47°8°)	44°7°	0%	3 mph5 km/h from NE, gusts 6 mph9 km/h	86%	14%	0
Sat 10a	Sunny	51°11° (likely 50°10° to 52°11°)	51°11°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	71%	0%	1
Sat 11a	Sunny	56°13° (likely 55°13° to 56°13°)	56°13°	0%	3 mph5 km/h from E, gusts 10 mph16 km/h	62%	0%	2
Sat 12p	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	3 mph5 km/h from E, gusts 10 mph16 km/h	55%	8%	3
Sat 1p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	46%	9%	4
Sat 2p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	3 mph5 km/h from E, gusts 8 mph14 km/h	43%	13%	3
Sat 3p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	5 mph8 km/h from E, gusts 8 mph13 km/h	41%	14%	2
Sat 4p	Mostly sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	5 mph8 km/h from E, gusts 8 mph13 km/h	43%	19%	1
Sat 5p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	5 mph8 km/h from E, gusts 8 mph13 km/h	46%	20%	1
Sat 6p	Clear	58°14° (likely 56°13° to 59°15°)	58°14°	0%	5 mph8 km/h from E, gusts 8 mph13 km/h	55%	16%	0
Sat 7p	Mostly clear	53°12° (likely 53°12° to 55°13°)	53°12°	0%	3 mph5 km/h from E, gusts 7 mph11 km/h	66%	24%	0
Sat 8p	Clear	51°11° (likely 50°10° to 52°11°)	51°11°	0%	3 mph5 km/h from E, gusts 8 mph12 km/h	74%	10%	0
Sat 9p	Clear	49°9° (likely 49°9° to 50°10°)	49°9°	0%	2 mph3 km/h from E, gusts 7 mph12 km/h	77%	0%	0
Sat 10p	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	86%	6%	0
Sat 11p	Clear	45°7° (likely 45°7° to 48°9°)	45°7°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	89%	15%	0
Sun 12a	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	1 mph2 km/h from E, gusts 6 mph10 km/h	93%	30%	0
Sun 1a	Fog	43°6° (likely 43°6° to 47°8°)	43°6°	0%	1 mph2 km/h from E, gusts 7 mph11 km/h	96%	24%	0
Sun 2a	Partly cloudy	42°6° (likely 42°6° to 48°9°)	42°6°	0%	1 mph2 km/h from NE, gusts 5 mph9 km/h	100%	39%	0
Sun 3a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from NE, gusts 5 mph7 km/h	100%	10%	0
Sun 4a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	100%	2%	0
Sun 5a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	1 mph2 km/h from N, gusts 5 mph7 km/h	100%	3%	0
Sun 6a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	1 mph2 km/h from N, gusts 5 mph8 km/h	100%	3%	0
Sun 7a	Sunny	38°3° (likely 38°3° to 44°7°)	38°3°	0%	1 mph2 km/h from N, gusts 6 mph10 km/h	100%	4%	0
Sun 8a	Sunny	39°4° (likely 39°4° to 43°6°)	39°4°	0%	2 mph3 km/h from N, gusts 6 mph10 km/h	100%	1%	0
Sun 9a	Sunny	45°7° (likely 44°7° to 48°9°)	45°7°	0%	2 mph3 km/h from N, gusts 7 mph11 km/h	89%	5%	1
Sun 10a	Mostly sunny	52°11° (likely 52°11° to 53°12°)	52°11°	0%	1 mph2 km/h from N, gusts 6 mph10 km/h	74%	14%	2
Sun 11a	Mostly sunny	57°14° (likely 57°14° to 58°14°)	57°14°	0%	2 mph3 km/h from NE, gusts 7 mph11 km/h	62%	12%	3
Sun 12p	Mostly sunny	60°16° (likely 59°15° to 61°16°)	60°16°	0%	2 mph3 km/h from NE, gusts 7 mph11 km/h	55%	9%	4
Sun 1p	Mostly sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	50%	16%	4
Sun 2p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	45%	40%	4
Sun 3p	Sunny	66°19° (likely 62°17° to 66°19°)	66°19°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	43%	25%	4
Sun 4p	Sunny	66°19° (likely 62°17° to 66°19°)	66°19°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	42%	8%	3
Sun 5p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	45%	7%	1
Sun 6p	Clear	62°17° (likely 58°14° to 62°17°)	62°17°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	50%	1%	0
Sun 7p	Clear	57°14° (likely 55°13° to 57°14°)	57°14°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	64%	0%	0
Sun 8p	Clear	54°12° (likely 52°11° to 55°13°)	54°12°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	74%	0%	0
Sun 9p	Clear	50°10° (likely 50°10° to 53°12°)	50°10°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	86%	0%	0
Sun 10p	Clear	48°9° (likely 48°9° to 51°11°)	48°9°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	93%	0%	0
Sun 11p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	96%	0%	0
Mon 12a	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	0 mph0 km/h, gusts 5 mph7 km/h	100%	0%	0
Mon 1a	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	100%	0%	0
Mon 2a	Clear	43°6° (likely 42°6° to 49°9°)	43°6°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	100%	0%	0
Mon 3a	Clear	42°6° (likely 40°4° to 51°11°)	42°6°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	12%	0
Mon 4a	Clear	42°6° (likely 39°4° to 50°10°)	42°6°	0%	2 mph3 km/h from W, gusts 4 mph6 km/h	100%	16%	0
Mon 5a	Clear	41°5° (likely 38°3° to 49°9°)	41°5°	0%	2 mph3 km/h from W, gusts 4 mph6 km/h	100%	16%	0
Mon 6a	Clear	40°4° (likely 37°3° to 49°9°)	40°4°	0%	2 mph3 km/h from W, gusts 4 mph6 km/h	100%	18%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Mostly sunny. High 63°17°, low 38°3°. Typical 65°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Today: Sunny, with a high near 63. Northeast wind around 5 mph.
Tonight: Patchy fog after 1am. Mostly clear, with a low around 38. Northeast wind 1 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
37°3°–41°5°
Typical high / low
65°18° / 42°6°
Wind
7 mph10 km/h, gusts 14 mph22 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 66°19°, low 39°4°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Patchy fog before 8am. Sunny, with a high near 66. East wind around 2 mph.
Night: Clear, with a low around 39. Southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
39°4°–43°6°
Typical high / low
64°18° / 42°6°
Wind
6 mph10 km/h
UV peak
4
Monday, Oct 26. Sunny. High 69°21°, low 48°9°. Typical 64°18° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 42°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69. Northwest wind 2 to 6 mph.
Night: Clear, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–69°21°
Low, likely
37°3°–48°9°
Typical high / low
64°18° / 41°5°
Wind
7 mph12 km/h, gusts 14 mph23 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 66°19°, low 46°8°. Typical 64°18° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Mostly clear, with a low around 46.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–70°21°
Low, likely
45°7°–51°11°
Typical high / low
64°18° / 41°5°
Wind
8 mph13 km/h, gusts 26 mph41 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 64°18°, low 47°8°. Typical 64°18° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 64.
Night: Mostly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
44°7°–49°9°
Typical high / low
64°18° / 41°5°
Wind
7 mph12 km/h, gusts 16 mph26 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 69°21°, low 49°9°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–69°21°
Low, likely
45°7°–49°9°
Typical high / low
63°17° / 40°4°
Wind
6 mph10 km/h, gusts 22 mph36 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 72°22°, low 50°10°. Typical 63°17° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 72.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
72°22°–74°23°
Low, likely
44°7°–50°10°
Typical high / low
63°17° / 40°4°
Wind
9 mph15 km/h, gusts 20 mph33 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 69°21°, low 47°8°. Typical 62°17° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–74°23°
Low, likely
43°6°–51°11°
Typical high / low
62°17° / 40°4°
Wind
10 mph16 km/h, gusts 21 mph34 km/h
UV peak
2
Sunday, Nov 1. Cloudy. High 67°19°, low 51°11°. Typical 62°17° / 40°4°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°15°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  20% chance · 0.02 in0.4 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–72°22°
Low, likely
47°8°–54°12°
Typical high / low
62°17° / 40°4°
Wind
8 mph13 km/h, gusts 21 mph34 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 68°20°, low 55°13°. Typical 62°17° / 39°4°. Rain 0.06 in1.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 58°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
56°13°–75°24°
Low, likely
49°9°–58°14°
Typical high / low
62°17° / 39°4°
Wind
8 mph12 km/h, gusts 20 mph32 km/h
UV peak
1

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 38°.
Tomorrow
Dry, high 66°, low 39°, warming up.
Monday
Dry, high 69°, low 48°, warming up.
Rest of week
Mostly dry, highs 64–72°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (LWX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Old Courthouse Spring Branch at Carrington Regional Park

2.6 mi

Level: 326 ft

Reading from Sat 6:50 AM · NWS gauge page

Rocky Run near Tysons Corner (Pulte/McLean Regional Pond)

2.8 mi

Level: 342 ft

Reading from Sat 2:35 AM · NWS gauge page

Holmes Run at Fairview Lake

3.1 mi

Below flood stage

Level: 310 ft

Reading from Sat 2:40 AM · NWS gauge page

Accotink Creek at Woodburn Road / Strathmeade Springs

3.8 mi

Below flood stage

Level: 248 ft

Reading from Sat 2:05 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 68% less heating than a typical week.

This week 28Typical 88

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 22
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 12 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 36°F).

Open the windows?

Today, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Washington Dulles International Airport · official normals 1991–2020 · records 1960–2026

Oct 24, today vs a typical year

Today’s expected high is 2°1° colder than typical.

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

−6°−3°SunOct 18
−3°−2°MonOct 19
+2°+1°TueOct 20
±0°WedOct 21
−2°−1°ThuOct 22
−1°FriOct 23
—SatOct 24

Vienna weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 24 min less
Golden hour: 5:41–6:34 PM; Morning 7:11–8:04 AM
Blue hour: 6:34–6:45 PM; Morning 7:00–7:11 AM; first light 7:00 AM

Stars tonight? Fair

Mostly clear 6:45 PM–12 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:40 AM · rises 5:14 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Vienna. The highest point on the skyline is about 3,300 ft, 52 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.