Prince William County, Virginia, United States

Last updated: 9:11 PM CDT  ·  Refresh
22°C
Feels like 22°
Mostly Clear
▲ 30°  /  ▼ 16°
Wind
9 mph N
Humidity
81%
Dew Point
18°
Pressure
29.74 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
21%
Sunrise
6:28 AM
Sunset
7:57 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Prince William County is currently mostly clear at 22°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:28AM · Sunset: 7:57PM.

Alerts

No active alerts for this location.
44 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
4%
11 PM
20°
21%
12 AM
19°
21%
1 AM
19°
14%
2 AM
18°
3%
3 AM
18°
3%
4 AM
17°
3%
5 AM
16°
3%
6 AM
16°
3%
7 AM
17°
3%
8 AM
17°
3%
9 AM
19°
6%
10 AM
20°
11%
11 AM
22°
11%
12 PM
22°
11%
1 PM
25°
14%
2 PM
26°
14%
3 PM
26°
22%
4 PM
27°
35%
5 PM
26°
36%
6 PM
25°
36%
7 PM
24°
36%
8 PM
23°
36%
9 PM
21°
40%
7-Day Forecast
Tonight
30° 16°
Mostly Clear.
Fri
28° 16°
Partly Cloudy with a 44% chance of rain.
Sat
25° 19°
Rain, 77% chance.
Sun
31° 18°
Mostly Cloudy with a 28% chance of rain.
Mon
30° 17°
Clear.
Tue
30° 17°
Rain, 61% chance.
Wed
31° 18°
Heavy Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Clear 4% 9 mph N 81%
11 PM 20° Mostly Clear 21% 9 mph N 83%
12 AM 19° Mostly Clear 21% 8 mph N 84%
1 AM 19° Partly Cloudy 14% 6 mph N 86%
2 AM 18° Partly Cloudy 3% 5 mph N 87%
3 AM 18° Partly Cloudy 3% 6 mph NNW 88%
4 AM 17° Partly Cloudy 3% 6 mph NNW 89%
5 AM 16° Partly Cloudy 3% 6 mph NNW 90%
6 AM 16° Partly Cloudy 3% 6 mph NNW 90%
7 AM 17° Partly Cloudy 3% 6 mph NNW 89%
8 AM 17° Mostly Cloudy 3% 7 mph N 86%
9 AM 19° Partly Cloudy 6% 7 mph N 80%
10 AM 20° Partly Cloudy 11% 7 mph N 74%
11 AM 22° Partly Cloudy 11% 7 mph N 69%
12 PM 22° Partly Cloudy 11% 5 mph N 67%
1 PM 25° Partly Cloudy 14% 4 mph NNE 64%
2 PM 26° Mostly Cloudy 14% 4 mph NE 62%
3 PM 26° Partly Cloudy 22% 3 mph NE 60%
4 PM 27° Partly Cloudy 35% 3 mph NE 58%
5 PM 26° Partly Cloudy 36% 3 mph NE 58%
6 PM 25° Partly Cloudy 36% 3 mph NE 62%
7 PM 24° Partly Cloudy 36% 3 mph NE 66%
8 PM 23° Partly Cloudy 36% 3 mph NE 70%
9 PM 21° Mostly Cloudy 40% 3 mph ENE 72%
15-Day Forecast
Today
8/20
Mostly Clear
4%
16°
30°
Fri
8/21
Partly Cloudy
44%
16°
28°
Sat
8/22
Rain
77%
19°
25°
Sun
8/23
Mostly Cloudy
28%
18°
31°
Mon
8/24
Clear
3%
17°
30°
Tue
8/25
Rain
61%
17°
30°
Wed
8/26
Heavy Rain
82%
18°
31°
Thu
8/27
Rain
82%
18°
29°
Fri
8/28
Rain
68%
19°
32°
Sat
8/29
Rain
68%
19°
33°
Sun
8/30
Clear
64%
19°
33°
Mon
8/31
Drizzle
60%
19°
32°
Tue
9/1
Drizzle
60%
18°
31°
Wed
9/2
Drizzle
60%
17°
30°
Thu
9/3
Drizzle
60%
17°
30°
44
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
44 AQI 8.0 µg/m³
O3
Ground-level ozone
33 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 44 Good 33 44
Sat 38 Good 32 38
Sun 39 Good 39 26
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Aug 20, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE7 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index4.0
Kinematics
0–6 km Shear34 kt
0–1 km Shear15 kt
Eff. Shear—
0–1 km SRH-68
0–3 km SRH-3
Eff. SRH—
Storm Motion307° @ 30 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index31.9
Thermo & Levels
PWAT1.77 in
0–3 km LR4.4 °C/km
700–500 LR5.0 °C/km
Total Totals40.8
LCL963 hPa
LFC—
EL—
Freezing Lvl14,570 ft