Observed 7:55 AM EDT at KDAA

Mason Neck, VA weather

Sunny and 37°3°.

Mostly agree

Now 37°3°

Sunny

Wind: Calm; Up to 5 mph8 km/h through 9 PM
Dew point: 36°2°; Comfortable · up to 45°7° by 11 AM
Humidity: 94%; Air 37°3°, dew point 36°2° · fog or dew likely
UV index: 0Low; Moderate 12–3 PM · peak 4
Air quality: 51Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.49 inHg1033 hPa; Rising slowly · +0.04 inHg+1.4 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

11°6° cooler than this time yesterday (54°12° then, 43°6° now)

Good hours for

Fog until 10 AM
Above 50°10° today by 10 AM
Below 50°10° tonight after 9 PM
Fog tonight 2–3 AM
Drops 12°7° tomorrow 5–8 PM (68°20° → 56°13°)

This morningUp to 57°14° by 11 AM · Clear
This afternoonUp to 65°18° by 2 PM · Clear
TonightDown to 40°4° by 1 AM · Partly cloudy
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 68°20° by 3 PM · Clear
Tomorrow nightDown to 42°6° by 2 AM · Clear
Monday morningNear 40°4° · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 9a	Fog	45°7° (likely 43°6° to 48°9°)	44°7°	0%	3 mph5 km/h from NE, gusts 7 mph12 km/h	86%	15%	0
Sat 10a	Sunny	51°11° (likely 49°9° to 53°12°)	51°11°	0%	3 mph5 km/h from NE, gusts 9 mph15 km/h	74%	3%	1
Sat 11a	Sunny	57°14° (likely 54°12° to 57°14°)	57°14°	0%	3 mph5 km/h from NE, gusts 10 mph16 km/h	64%	38%	2
Sat 12p	Mostly sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	5 mph8 km/h from E, gusts 11 mph17 km/h	55%	25%	3
Sat 1p	Mostly sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	3 mph5 km/h from E, gusts 10 mph16 km/h	52%	24%	4
Sat 2p	Mostly sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	3 mph5 km/h from E, gusts 9 mph15 km/h	45%	19%	3
Sat 3p	Mostly sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	5 mph8 km/h from E, gusts 7 mph12 km/h	43%	27%	2
Sat 4p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	45%	19%	1
Sat 5p	Sunny	64°18° (likely 60°16° to 64°18°)	64°18°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	46%	17%	1
Sat 6p	Mostly clear	60°16° (likely 57°14° to 60°16°)	60°16°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	53%	49%	0
Sat 7p	Mostly clear	53°12° (likely 53°12° to 58°14°)	53°12°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	69%	49%	0
Sat 8p	Mostly clear	50°10° (likely 50°10° to 57°14°)	49°9°	0%	3 mph5 km/h from E, gusts 8 mph13 km/h	77%	18%	0
Sat 9p	Mostly clear	47°8° (likely 47°8° to 55°13°)	47°8°	0%	2 mph3 km/h from NE, gusts 7 mph11 km/h	83%	33%	0
Sat 10p	Mostly clear	44°7° (likely 44°7° to 53°12°)	44°7°	0%	2 mph3 km/h from NE, gusts 6 mph9 km/h	96%	54%	0
Sat 11p	Mostly clear	43°6° (likely 43°6° to 54°12°)	43°6°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	100%	54%	0
Sun 12a	Partly cloudy	42°6° (likely 42°6° to 53°12°)	42°6°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	100%	46%	0
Sun 1a	Partly cloudy	40°4° (likely 40°4° to 51°11°)	40°4°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	100%	37%	0
Sun 2a	Fog	40°4° (likely 40°4° to 51°11°)	40°4°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	100%	44%	0
Sun 3a	Clear	40°4° (likely 40°4° to 49°9°)	40°4°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	100%	19%	0
Sun 4a	Clear	40°4° (likely 40°4° to 47°8°)	40°4°	0%	1 mph2 km/h from N, gusts 4 mph7 km/h	100%	7%	0
Sun 5a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	100%	6%	0
Sun 6a	Clear	39°4° (likely 39°4° to 46°8°)	39°4°	0%	2 mph3 km/h from N, gusts 6 mph9 km/h	100%	6%	0
Sun 7a	Sunny	39°4° (likely 39°4° to 45°7°)	39°4°	0%	2 mph3 km/h from N, gusts 7 mph11 km/h	100%	6%	0
Sun 8a	Sunny	39°4° (likely 39°4° to 45°7°)	39°4°	0%	2 mph3 km/h from N, gusts 6 mph10 km/h	100%	6%	0
Sun 9a	Sunny	46°8° (likely 46°8° to 49°9°)	46°8°	0%	2 mph3 km/h from NE, gusts 6 mph10 km/h	93%	6%	1
Sun 10a	Sunny	52°11° (likely 52°11° to 55°13°)	52°11°	0%	2 mph3 km/h from NE, gusts 9 mph14 km/h	77%	5%	2
Sun 11a	Sunny	57°14° (likely 57°14° to 60°16°)	57°14°	0%	2 mph3 km/h from NE, gusts 9 mph14 km/h	67%	6%	3
Sun 12p	Mostly sunny	61°16° (likely 61°16° to 63°17°)	61°16°	0%	2 mph3 km/h from NE, gusts 6 mph10 km/h	58%	9%	4
Sun 1p	Mostly sunny	65°18° (likely 63°17° to 65°18°)	65°18°	0%	1 mph2 km/h from NE, gusts 5 mph9 km/h	48%	14%	4
Sun 2p	Sunny	67°19° (likely 63°17° to 67°19°)	67°19°	0%	1 mph2 km/h from E, gusts 5 mph7 km/h	45%	40%	4
Sun 3p	Sunny	68°20° (likely 62°17° to 68°20°)	68°20°	0%	0 mph0 km/h, gusts 4 mph6 km/h	43%	33%	4
Sun 4p	Sunny	68°20° (likely 63°17° to 68°20°)	68°20°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	43%	13%	3
Sun 5p	Sunny	68°20° (likely 63°17° to 68°20°)	68°20°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	43%	3%	1
Sun 6p	Clear	63°17° (likely 59°15° to 63°17°)	63°17°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	52%	0%	0
Sun 7p	Clear	56°13° (likely 55°13° to 58°14°)	56°13°	0%	2 mph3 km/h from E, gusts 3 mph5 km/h	69%	0%	0
Sun 8p	Clear	52°11° (likely 52°11° to 54°12°)	52°11°	0%	1 mph2 km/h from E, gusts 5 mph7 km/h	80%	0%	0
Sun 9p	Clear	50°10° (likely 50°10° to 52°11°)	50°10°	0%	1 mph2 km/h from SE, gusts 5 mph7 km/h	83%	0%	0
Sun 10p	Clear	48°9° (likely 48°9° to 51°11°)	48°9°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	89%	0%	0
Sun 11p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	93%	4%	0
Mon 12a	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	6%	0
Mon 1a	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	1 mph2 km/h from W, gusts 2 mph3 km/h	100%	3%	0
Mon 2a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from W, gusts 2 mph3 km/h	100%	3%	0
Mon 3a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from W, gusts 2 mph4 km/h	100%	18%	0
Mon 4a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from W, gusts 2 mph4 km/h	100%	27%	0
Mon 5a	Mostly clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	100%	32%	0
Mon 6a	Mostly clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	100%	32%	0
Mon 7a	Mostly sunny	39°4° (likely 39°4° to 45°7°)	39°4°	0%	2 mph3 km/h from W, gusts 3 mph4 km/h	100%	36%	0
Mon 8a	Mostly sunny	40°4° (likely 40°4° to 45°7°)	40°4°	0%	2 mph3 km/h from W, gusts 3 mph4 km/h	100%	36%	0

Days ahead

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

Today, Oct 24. Mostly sunny. High 65°18°, low 39°4°. Typical 66°19° / 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Official NWS forecast
Today: Sunny, with a high near 65. East wind around 5 mph.
Tonight: Patchy fog between midnight and 5am. Mostly clear, with a low around 39. Northeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–65°18°
Low, likely
39°4°–43°6°
Typical high / low
66°19° / 49°9°
Wind
8 mph12 km/h, gusts 14 mph23 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 68°20°, low 39°4°. Typical 66°19° / 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Day: Sunny, with a high near 68. Northeast wind around 2 mph.
Night: Clear, with a low around 39. East wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–68°20°
Low, likely
39°4°–45°7°
Typical high / low
66°19° / 49°9°
Wind
7 mph11 km/h, gusts 12 mph19 km/h
UV peak
4
Monday, Oct 26. Sunny. High 70°21°, low 50°10°. Typical 66°19° / 48°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 70. West wind around 3 mph.
Night: Clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–70°21°
Low, likely
42°6°–50°10°
Typical high / low
66°19° / 48°9°
Wind
7 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 68°20°, low 47°8°. Typical 65°18° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  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, 48°9°
  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 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–70°21°
Low, likely
47°8°–52°11°
Typical high / low
65°18° / 48°9°
Wind
8 mph13 km/h, gusts 21 mph33 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 66°19°, low 48°9°. Typical 65°18° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 66.
Night: Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–67°19°
Low, likely
46°8°–48°9°
Typical high / low
65°18° / 48°9°
Wind
6 mph10 km/h, gusts 16 mph26 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 71°22°, low 52°11°. Typical 65°18° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  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, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 71.
Night: Mostly clear, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–71°22°
Low, likely
47°8°–52°11°
Typical high / low
65°18° / 47°8°
Wind
6 mph9 km/h, gusts 20 mph32 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 74°23°, low 52°11°. Typical 64°18° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°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 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–75°24°
Low, likely
48°9°–52°11°
Typical high / low
64°18° / 47°8°
Wind
9 mph14 km/h, gusts 25 mph40 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 70°21°, low 49°9°. Typical 64°18° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°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
47°8°–51°11°
Typical high / low
64°18° / 46°8°
Wind
9 mph15 km/h, gusts 25 mph40 km/h
UV peak
2
Sunday, Nov 1. Cloudy. High 68°20°, low 51°11°. Typical 64°18° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 55°13°
  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
59°15°–72°22°
Low, likely
42°6°–54°12°
Typical high / low
64°18° / 46°8°
Wind
8 mph13 km/h, gusts 21 mph33 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 69°21°, low 54°12°. Typical 63°17° / 46°8°. Rain 0.04 in1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  20% chance
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
58°14°–77°25°
Low, likely
45°7°–59°15°
Typical high / low
63°17° / 46°8°
Wind
7 mph11 km/h, gusts 16 mph25 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 65°, low 39°.
Tomorrow
Dry, high 68°, low 39°, warming up.
Monday
Dry, high 70°, low 50°.
Rest of week
Mostly dry, highs 66–74°.

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 at Indian Head (IN MLLW)

3.5 mi

Level: 3.1 ft

Reading from Sat 7:42 AM · NWS gauge page

Potomac River at Leesylvania State Park

5.8 mi

Below flood stage

Level: 3.1 ft

Reading from Sat 7:50 AM · NWS gauge page

Unnamed Tributary at Kingstowne Regional Pond

7.0 mi

Level: 147 ft

Reading from Sat 7:05 AM · NWS gauge page

Mattawoman Creek near Pomonkey

7.2 mi

Below flood stage

Level: 2.2 ft
Flow: 8 cfs

Reading from Sat 6:50 AM · NWS gauge page

For your home

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

Heating this week

About 52% less heating than a typical week.

This week 28Typical 59

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 23
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 16 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 36°F).

Open the windows?

Today, 12:00 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 about typical for the date.

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

Mason Neck weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 51 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 23 min less
Golden hour: 5:41–6:34 PM; Morning 7:10–8:03 AM
Blue hour: 6:34–6:45 PM; Morning 6:59–7:10 AM; first light 6:59 AM

Stars tonight? Fair

Mostly clear 3–7 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:39 AM · rises 5:14 PM
Full moon: Oct 26
New moon: Nov 9

Looking south from Mason Neck. Water in view.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.