Observed 1:40 PM EDT at KIAD

Arcola, VA weather

Mostly cloudy and 63°17°, jacket by 7 PM.

Mostly agree

Now 63°17°

Mostly cloudy

Wind: 6 mph9 km/h; From the southeast. Up to 6 mph9 km/h through 1 AM
Dew point: 41°5°; Comfortable
UV index: 4Moderate; Moderate until 5 PM
Air quality: 30Good; Ozone · tomorrow moderate
Pressure: 30.53 inHg1034 hPa; Falling · −0.05 inHg−1.7 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (59°15° then, 60°16° now)

Good hours for

High 63°17° today at 3 PM
Below 50°10° tonight after 8 PM
Fog tonight 2–3 AM
Low 35°2° tomorrow at 6 AM
Above 50°10° tomorrow by 10 AM

This afternoonNear 61°16° · Clear
TonightDown to 36°2° by 4 AM · Clear
Tomorrow morningUp to 56°13° by 11 AM · Clear
Tomorrow afternoonUp to 66°19° by 3 PM · Clear
Tomorrow nightDown to 39°4° by 5 AM · Clear
Monday morningUp to 57°14° by 11 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 1p	Sunny	60°16° (likely 59°15° to 60°16°)	60°16°	0%	5 mph8 km/h from E, gusts 10 mph15 km/h	49%	7%	4
Sat 2p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	44%	10%	4
Sat 3p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	5 mph8 km/h from SE, gusts 7 mph11 km/h	43%	12%	4
Sat 4p	Mostly sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	44%	16%	3
Sat 5p	Partly sunny	61°16° (likely 59°15° to 63°17°)	61°16°	0%	5 mph8 km/h from SE, gusts 7 mph11 km/h	46%	27%	2
Sat 6p	Mostly clear	58°14° (likely 56°13° to 60°16°)	58°14°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	53%	40%	0
Sat 7p	Partly cloudy	52°11° (likely 52°11° to 56°13°)	52°11°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	69%	29%	0
Sat 8p	Partly cloudy	48°9° (likely 48°9° to 53°12°)	47°8°	0%	3 mph5 km/h from E, gusts 7 mph12 km/h	80%	20%	0
Sat 9p	Clear	46°8° (likely 46°8° to 51°11°)	46°8°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	83%	12%	0
Sat 10p	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	89%	9%	0
Sat 11p	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	1 mph2 km/h from E, gusts 4 mph7 km/h	96%	13%	0
Sun 12a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	20%	0
Sun 1a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	22%	0
Sun 2a	Fog	39°4° (likely 39°4° to 46°8°)	39°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	35%	0
Sun 3a	Clear	37°3° (likely 37°3° to 45°7°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	18%	0
Sun 4a	Clear	36°2° (likely 36°2° to 44°7°)	36°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	14%	0
Sun 5a	Clear	36°2° (likely 36°2° to 43°6°)	36°2°	0%	1 mph2 km/h from N, gusts 3 mph5 km/h	100%	13%	0
Sun 6a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	100%	13%	0
Sun 7a	Sunny	35°2° (likely 35°2° to 40°4°)	35°2°	0%	1 mph2 km/h from N, gusts 5 mph9 km/h	100%	10%	0
Sun 8a	Sunny	35°2° (likely 35°2° to 41°5°)	35°2°	0%	1 mph2 km/h from NW, gusts 5 mph8 km/h	100%	3%	0
Sun 9a	Sunny	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from N, gusts 5 mph8 km/h	96%	5%	1
Sun 10a	Sunny	50°10° (likely 50°10° to 52°11°)	50°10°	0%	1 mph2 km/h from N, gusts 6 mph9 km/h	77%	4%	2
Sun 11a	Sunny	56°13° (likely 54°12° to 57°14°)	56°13°	0%	0 mph0 km/h, gusts 5 mph8 km/h	66%	5%	3
Sun 12p	Sunny	60°16° (likely 58°14° to 61°16°)	60°16°	0%	1 mph2 km/h from NE, gusts 6 mph10 km/h	58%	6%	4
Sun 1p	Sunny	62°17° (likely 61°16° to 63°17°)	62°17°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	54%	6%	4
Sun 2p	Sunny	65°18° (likely 63°17° to 65°18°)	65°18°	0%	1 mph2 km/h from SE, gusts 6 mph10 km/h	46%	9%	4
Sun 3p	Sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	1 mph2 km/h from SE, gusts 6 mph10 km/h	45%	7%	4
Sun 4p	Sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	1 mph2 km/h from SE, gusts 7 mph12 km/h	47%	8%	3
Sun 5p	Sunny	65°18° (likely 63°17° to 65°18°)	65°18°	0%	2 mph3 km/h from S, gusts 7 mph11 km/h	48%	7%	2
Sun 6p	Clear	61°16° (likely 58°14° to 62°17°)	61°16°	0%	1 mph2 km/h from S, gusts 5 mph9 km/h	56%	0%	0
Sun 7p	Clear	55°13° (likely 55°13° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 3 mph5 km/h	72%	1%	0
Sun 8p	Clear	52°11° (likely 52°11° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 2 mph4 km/h	80%	1%	0
Sun 9p	Clear	48°9° (likely 48°9° to 54°12°)	48°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	0%	0
Sun 10p	Clear	46°8° (likely 46°8° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	93%	0%	0
Sun 11p	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Mon 12a	Clear	42°6° (likely 42°6° to 48°9°)	42°6°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	0%	0
Mon 1a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from SW, gusts 4 mph7 km/h	100%	0%	0
Mon 2a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	2%	0
Mon 3a	Clear	41°5° (likely 41°5° to 44°7°)	41°5°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	11%	0
Mon 4a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from W, gusts 5 mph7 km/h	100%	14%	0
Mon 5a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	100%	15%	0
Mon 6a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	1 mph2 km/h from W, gusts 3 mph4 km/h	100%	23%	0
Mon 7a	Mostly clear	36°2° (likely 36°2° to 41°5°)	36°2°	0%	2 mph3 km/h from W, gusts 3 mph5 km/h	100%	28%	0
Mon 8a	Mostly sunny	38°3° (likely 36°2° to 42°6°)	38°3°	0%	2 mph3 km/h from W, gusts 2 mph4 km/h	100%	29%	0
Mon 9a	Sunny	43°6° (likely 38°3° to 49°9°)	43°6°	0%	2 mph3 km/h from W, gusts 4 mph7 km/h	93%	28%	1
Mon 10a	Sunny	50°10° (likely 46°8° to 55°13°)	50°10°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	80%	2%	2
Mon 11a	Sunny	57°14° (likely 54°12° to 60°16°)	57°14°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	67%	0%	3
Mon 12p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	3 mph5 km/h from NW, gusts 8 mph13 km/h	58%	0%	4

Days ahead

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

Today, Oct 24. Mostly sunny. High 63°17°, low 35°2°. Typical 65°18° / 42°6°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
2. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Official NWS forecast
Today: Sunny, with a high near 63. Southeast wind around 5 mph.
Tonight: Patchy fog between 11pm and 3am, then patchy frost and patchy fog. Mostly clear, with a low around 35. Northeast wind 0 to 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
34°1°–38°3°
Typical high / low
65°18° / 42°6°
Wind
5 mph8 km/h, gusts 12 mph19 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 66°19°, low 36°2°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Day: Patchy frost and patchy fog before 10am. Sunny, with a high near 66. Northeast wind around 2 mph.
Night: Clear, with a low around 36. Southwest wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–66°19°
Low, likely
36°2°–40°4°
Typical high / low
64°18° / 42°6°
Wind
6 mph10 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 47°8°. Typical 64°18° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Official NWS forecast
Day: Patchy frost before 8am. Sunny, with a high near 69. Northwest wind 1 to 5 mph.
Night: Mostly clear, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–69°21°
Low, likely
36°2°–47°8°
Typical high / low
64°18° / 41°5°
Wind
7 mph11 km/h, gusts 14 mph23 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 66°19°, low 44°7°. Typical 64°18° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 45°7°
  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 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
43°6°–49°9°
Typical high / low
64°18° / 41°5°
Wind
8 mph12 km/h, gusts 15 mph24 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 64°18°, low 46°8°. Typical 64°18° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 45°7°
  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, 46°8°
  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 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
41°5°–47°8°
Typical high / low
64°18° / 41°5°
Wind
6 mph10 km/h, gusts 16 mph25 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 69°21°, low 48°9°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  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 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–69°21°
Low, likely
44°7°–48°9°
Typical high / low
63°17° / 40°4°
Wind
7 mph11 km/h, gusts 24 mph38 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 72°22°, low 48°9°. Typical 63°17° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  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 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
72°22°–74°23°
Low, likely
42°6°–48°9°
Typical high / low
63°17° / 40°4°
Wind
7 mph11 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 71°22°, low 48°9°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–75°24°
Low, likely
43°6°–51°11°
Typical high / low
62°17° / 40°4°
Wind
6 mph10 km/h, gusts 28 mph44 km/h
UV peak
4
Sunday, Nov 1. Drizzle. High 70°21°, low 53°12°. Typical 62°17° / 40°4°. Rain 0.03 in0.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 62°17°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Drizzle, 59°15°
  30% chance · 0.06 in1.6 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
64°18°–73°23°
Low, likely
51°11°–54°12°
Typical high / low
62°17° / 40°4°
Wind
9 mph15 km/h, gusts 22 mph36 km/h
UV peak
2
Monday, Nov 2. Drizzle. High 70°21°, low 56°13°. Typical 62°17° / 39°4°. Rain 0.49 in12 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  20% chance · 0.44 in11 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
63°17°–76°24°
Low, likely
50°10°–59°15°
Typical high / low
62°17° / 39°4°
Wind
15 mph24 km/h

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 35°.
Tomorrow
Dry, high 66°, low 36°, warming up.
Monday
Dry, high 69°, low 47°, 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

Goose Creek near Leesburg

5.7 mi

Below flood stage

Level: 1.5 ft
Flow: 106 cfs

Forecast peak 1.6 ft Sun 2 AM

Reading from Sat 12:45 PM · NWS gauge page

Potomac River at Edwards Ferry

11 mi

Below flood stage

Level: 3.9 ft

Forecast peak 3.9 ft Sat 8 PM

Reading from Sat 12:45 PM · NWS gauge page

Unnamed Tributary at Dulles Station near Herndon

6.2 mi

Level: 307 ft

Reading from Sat 12 PM · NWS gauge page

Flatlick Branch at Chantilly

7.0 mi

Below flood stage

Level: 1.1 ft
Flow: 18 cfs

Reading from Sat 1 PM · NWS gauge page

For your home

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

Heating this week

About 63% less heating than a typical week.

This week 33Typical 88

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 25
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 20 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 2:00 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

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

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 16 s a day; shortest Dec 21, 1 h 24 min less
Golden hour: 5:42–6:35 PM; Morning 7:12–8:05 AM
Blue hour: 6:35–6:46 PM; Morning 7:01–7:12 AM; first light 7:01 AM

Stars tonight? Fair

Mostly clear 8 PM–2 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:41 AM · rises 5:15 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Arcola. The highest point on the skyline is about 2,500 ft, 28 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Arcola, VA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Goose Creek near Leesburg

Potomac River at Edwards Ferry

Unnamed Tributary at Dulles Station near Herndon

Flatlick Branch at Chantilly

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon