Observed 5:25 PM EDT at KGAI

Potomac, MD weather

Mostly sunny and 61°16°, jacket by 8 PM.

Mostly agree

Now 61°16°

Mostly sunny

Wind: Calm; Up to 5 mph8 km/h through 5 AM
Dew point: 39°4°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Air quality: 34Good; Ozone · tomorrow moderate
Pressure: 30.51 inHg1033 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (62°17° then, 62°17° now)

Good hours for

Below 50°10° tonight after 9 PM
Low 40°4° tomorrow at 7 AM
Above 50°10° tomorrow by 10 AM
High 65°18° tomorrow at 3 PM

TonightDown to 41°5° by 5 AM · Clear
Tomorrow morningUp to 56°13° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 3 PM · Clear
Tomorrow nightDown to 42°6° by 4 AM · Clear
Monday morningUp to 57°14° by 11 AM · Clear
Monday afternoonUp to 68°20° by 3 PM · 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 5p	Mostly sunny	61°16° (likely 59°15° to 63°17°)	61°16°	0%	6 mph10 km/h from E, gusts 10 mph16 km/h	44%	37%	1
Sat 6p	Clear	59°15° (likely 56°13° to 60°16°)	59°15°	0%	5 mph8 km/h from E, gusts 11 mph17 km/h	47%	15%	0
Sat 7p	Clear	56°13° (likely 52°11° to 56°13°)	56°13°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	55%	12%	0
Sat 8p	Clear	51°11° (likely 50°10° to 53°12°)	51°11°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	68%	12%	0
Sat 9p	Clear	49°9° (likely 48°9° to 51°11°)	48°9°	0%	3 mph5 km/h from E, gusts 8 mph12 km/h	74%	2%	0
Sat 10p	Clear	48°9° (likely 47°8° to 49°9°)	48°9°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	77%	9%	0
Sat 11p	Clear	47°8° (likely 47°8° to 48°9°)	47°8°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	83%	15%	0
Sun 12a	Clear	46°8° (likely 46°8° to 47°8°)	46°8°	0%	2 mph3 km/h from NE, gusts 5 mph9 km/h	86%	15%	0
Sun 1a	Clear	44°7° (likely 44°7° to 46°8°)	44°7°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	93%	12%	0
Sun 2a	Clear	43°6° (likely 43°6° to 45°7°)	43°6°	0%	1 mph2 km/h from SE, gusts 3 mph5 km/h	93%	8%	0
Sun 3a	Clear	43°6° (likely 43°6° to 45°7°)	43°6°	0%	2 mph3 km/h from SE, gusts 3 mph5 km/h	93%	1%	0
Sun 4a	Clear	42°6° (likely 42°6° to 44°7°)	42°6°	0%	2 mph3 km/h from SE, gusts 3 mph5 km/h	93%	1%	0
Sun 5a	Clear	41°5° (likely 41°5° to 43°6°)	41°5°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	96%	10%	0
Sun 6a	Clear	41°5° (likely 40°4° to 43°6°)	41°5°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	92%	12%	0
Sun 7a	Sunny	40°4° (likely 39°4° to 42°6°)	40°4°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	100%	11%	0
Sun 8a	Sunny	40°4° (likely 38°3° to 43°6°)	40°4°	0%	2 mph3 km/h from N, gusts 4 mph7 km/h	96%	15%	0
Sun 9a	Sunny	45°7° (likely 44°7° to 47°8°)	45°7°	0%	1 mph2 km/h from N, gusts 5 mph8 km/h	89%	13%	1
Sun 10a	Sunny	52°11° (likely 52°11° to 55°13°)	52°11°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	74%	5%	2
Sun 11a	Sunny	56°13° (likely 56°13° to 59°15°)	56°13°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	66%	2%	3
Sun 12p	Sunny	59°15° (likely 59°15° to 62°17°)	59°15°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	57%	6%	4
Sun 1p	Sunny	62°17° (likely 62°17° to 64°18°)	62°17°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	52%	4%	4
Sun 2p	Sunny	63°17° (likely 63°17° to 65°18°)	63°17°	0%	2 mph3 km/h from S, gusts 6 mph9 km/h	48%	4%	4
Sun 3p	Sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	45%	10%	4
Sun 4p	Sunny	64°18° (likely 63°17° to 66°19°)	64°18°	0%	2 mph3 km/h from S, gusts 7 mph11 km/h	46%	9%	3
Sun 5p	Sunny	64°18° (likely 62°17° to 65°18°)	64°18°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	46%	4%	1
Sun 6p	Clear	62°17° (likely 59°15° to 62°17°)	62°17°	0%	1 mph2 km/h from SE, gusts 5 mph7 km/h	50%	3%	0
Sun 7p	Clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	59%	2%	0
Sun 8p	Clear	53°12° (likely 52°11° to 56°13°)	53°12°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	71%	0%	0
Sun 9p	Clear	50°10° (likely 49°9° to 54°12°)	50°10°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	80%	0%	0
Sun 10p	Clear	48°9° (likely 48°9° to 51°11°)	48°9°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	89%	0%	0
Sun 11p	Clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	89%	0%	0
Mon 12a	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	1 mph2 km/h from S, gusts 3 mph4 km/h	93%	0%	0
Mon 1a	Clear	45°7° (likely 45°7° to 48°9°)	45°7°	0%	1 mph2 km/h from SW, gusts 3 mph5 km/h	93%	0%	0
Mon 2a	Clear	44°7° (likely 43°6° to 46°8°)	44°7°	0%	1 mph2 km/h from W, gusts 2 mph4 km/h	93%	1%	0
Mon 3a	Clear	43°6° (likely 42°6° to 45°7°)	43°6°	0%	1 mph2 km/h from W, gusts 2 mph4 km/h	96%	11%	0
Mon 4a	Clear	42°6° (likely 41°5° to 45°7°)	42°6°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	96%	14%	0
Mon 5a	Clear	42°6° (likely 41°5° to 44°7°)	42°6°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	96%	11%	0
Mon 6a	Clear	42°6° (likely 40°4° to 44°7°)	42°6°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	93%	14%	0
Mon 7a	Sunny	41°5° (likely 39°4° to 43°6°)	41°5°	0%	1 mph2 km/h from W, gusts 5 mph7 km/h	96%	20%	0
Mon 8a	Sunny	41°5° (likely 38°3° to 43°6°)	41°5°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	96%	23%	0
Mon 9a	Sunny	46°8° (likely 43°6° to 47°8°)	46°8°	0%	2 mph3 km/h from W, gusts 6 mph9 km/h	86%	21%	1
Mon 10a	Sunny	51°11° (likely 51°11° to 54°12°)	51°11°	0%	3 mph5 km/h from W, gusts 9 mph14 km/h	77%	7%	2
Mon 11a	Sunny	57°14° (likely 57°14° to 59°15°)	57°14°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	64%	8%	3
Mon 12p	Sunny	61°16° (likely 61°16° to 63°17°)	61°16°	0%	6 mph10 km/h from W, gusts 9 mph15 km/h	56%	0%	4
Mon 1p	Sunny	64°18° (likely 64°18° to 66°19°)	64°18°	0%	6 mph10 km/h from NW, gusts 10 mph15 km/h	50%	0%	4
Mon 2p	Sunny	66°19° (likely 66°19° to 68°20°)	66°19°	0%	6 mph10 km/h from NW, gusts 10 mph16 km/h	48%	0%	4
Mon 3p	Sunny	68°20° (likely 66°19° to 69°21°)	68°20°	0%	7 mph11 km/h from NW, gusts 12 mph19 km/h	45%	0%	4
Mon 4p	Sunny	68°20° (likely 66°19° to 69°21°)	68°20°	0%	6 mph10 km/h from NW, gusts 12 mph20 km/h	47%	0%	3

Days ahead

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

Today, Oct 24. Mostly sunny. High 63°17°, low 39°4°. Typical 66°19° / 49°9°. Dry. Mostly agree.
1. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Today: Sunny, with a high near 63. East wind around 6 mph.
Tonight: Mostly clear, with a low around 39. East wind 1 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
37°3°–39°4°
Typical high / low
66°19° / 49°9°
Wind
8 mph13 km/h, gusts 14 mph22 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 65°18°, low 40°4°. Typical 66°19° / 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Day: Sunny, with a high near 65. Southeast wind around 2 mph.
Night: Clear, with a low around 40. South wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
38°3°–42°6°
Typical high / low
66°19° / 49°9°
Wind
5 mph8 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 47°8°. Typical 66°19° / 48°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  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, 48°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 69. Northwest wind 1 to 7 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
38°3°–47°8°
Typical high / low
66°19° / 48°9°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 68°20°, low 46°8°. Typical 65°18° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 68.
Night: Mostly clear, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
45°7°–49°9°
Typical high / low
65°18° / 48°9°
Wind
8 mph13 km/h, gusts 19 mph30 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 65°18°, low 47°8°. Typical 65°18° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 46°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 65.
Night: Mostly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
43°6°–48°9°
Typical high / low
65°18° / 48°9°
Wind
7 mph11 km/h, gusts 17 mph28 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 70°21°, low 49°9°. Typical 65°18° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–71°22°
Low, likely
46°8°–49°9°
Typical high / low
65°18° / 47°8°
Wind
6 mph9 km/h, gusts 22 mph36 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 74°23°, low 50°10°. Typical 64°18° / 47°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 47°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 74.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
73°23°–75°24°
Low, likely
44°7°–50°10°
Typical high / low
64°18° / 47°8°
Wind
6 mph9 km/h, gusts 26 mph41 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 69°21°, low 49°9°. Typical 64°18° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 71°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–73°23°
Low, likely
45°7°–52°11°
Typical high / low
64°18° / 46°8°
Wind
7 mph11 km/h, gusts 27 mph44 km/h
UV peak
4
Sunday, Nov 1. Drizzle. High 69°21°, low 53°12°. Typical 64°18° / 46°8°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 68°20°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  30% chance · 0.06 in1.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 62°17°
  30% chance · 0.08 in2.1 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
65°18°–74°23°
Low, likely
50°10°–57°14°
Typical high / low
64°18° / 46°8°
Wind
10 mph15 km/h, gusts 22 mph36 km/h
UV peak
2
Monday, Nov 2. Drizzle. High 71°22°, low 59°15°. Typical 63°17° / 46°8°. Rain 0.44 in11 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 63°17°
  20% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Drizzle, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  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
64°18°–78°26°
Low, likely
55°13°–66°19°
Typical high / low
63°17° / 46°8°
Wind
16 mph26 km/h, gusts 37 mph59 km/h

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 39°.
Tomorrow
Dry, high 65°, low 40°.
Monday
Dry, high 69°, low 47°, warming up.
Rest of week
Mostly dry, highs 65–74°.

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

Potomac River near Washington DC (Little Falls)

5.6 mi

Below flood stage

Level: 3.1 ft
Flow: 3,450 cfs

Forecast peak 3.1 ft Sat 8 PM

Reading from Sat 4:50 PM · NWS gauge page

Dead Run near McLean

3.8 mi

Below flood stage

Level: 1.2 ft
Flow: under 1 cfs

Reading from Sat 4:25 PM · NWS gauge page

Difficult Run near Great Falls

3.8 mi

Below flood stage

Level: 2.7 ft
Flow: 15 cfs

Reading from Sat 4:15 PM · NWS gauge page

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

5.8 mi

Level: 342 ft

Reading from Sat 2:35 PM · NWS gauge page

For your home

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

Heating this week

About 53% less heating than a typical week.

This week 27Typical 59

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 10 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 39°F).

Open the windows?

Sun, 1:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

Washington Reagan National Airport · official normals 1991–2020 · records 1872–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Last 7 days vs normal

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

−7°−4°SunOct 18
−4°−2°MonOct 19
+1°±0°TueOct 20
±0°WedOct 21
−1°ThuOct 22
−1°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 24 min less
Golden hour: 5:40–6:34 PM; Morning 7:10–8:04 AM
Blue hour: 6:34–6:44 PM; Morning 7:00–7:10 AM; first light 7:00 AM

Stars tonight? Fair

Clear 6:44 PM–7:01 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

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

Looking west from Potomac. The highest point on the skyline is about 2,200 ft, 36 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Potomac, MD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Potomac River near Washington DC (Little Falls)

Dead Run near McLean

Difficult Run near Great Falls

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

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