Arlington County, Virginia, United States

Last updated: 9:11 PM CDT  ·  Refresh
22°C
Feels like 21°
Mostly Clear
▲ 31°  /  ▼ 17°
Wind
10 mph NNW
Humidity
79%
Dew Point
18°
Pressure
29.78 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
27%
Sunrise
6:26 AM
Sunset
7:56 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Arlington County is currently mostly clear at 21°C. Precipitation is likely — peak probability 51% around 10 PM. Sunrise: 6:26AM · Sunset: 7:56PM.

Alerts

No active alerts for this location.
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
4%
11 PM
21°
21%
12 AM
20°
21%
1 AM
20°
14%
2 AM
19°
3%
3 AM
19°
3%
4 AM
19°
3%
5 AM
18°
3%
6 AM
17°
3%
7 AM
17°
3%
8 AM
18°
3%
9 AM
19°
6%
10 AM
21°
6%
11 AM
22°
6%
12 PM
23°
6%
1 PM
26°
6%
2 PM
26°
5%
3 PM
27°
14%
4 PM
27°
32%
5 PM
26°
32%
6 PM
26°
36%
7 PM
25°
36%
8 PM
24°
36%
9 PM
22°
40%
7-Day Forecast
Tonight
31° 17°
Mostly Clear.
Fri
28° 17°
Partly Cloudy with a 50% chance of rain.
Sat
25° 20°
Overcast with a 81% chance of rain.
Sun
31° 20°
Mostly Cloudy with a 28% chance of rain.
Mon
30° 18°
Clear.
Tue
31° 19°
Rain, 61% chance.
Wed
31° 19°
Heavy Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Clear 4% 10 mph NNW 79%
11 PM 21° Partly Cloudy 21% 8 mph N 80%
12 AM 20° Mostly Clear 21% 7 mph N 80%
1 AM 20° Partly Cloudy 14% 5 mph N 81%
2 AM 19° Partly Cloudy 3% 5 mph N 82%
3 AM 19° Partly Cloudy 3% 5 mph NNW 83%
4 AM 19° Partly Cloudy 3% 6 mph NNW 83%
5 AM 18° Partly Cloudy 3% 6 mph NNW 86%
6 AM 17° Partly Cloudy 3% 6 mph NNW 85%
7 AM 17° Partly Cloudy 3% 6 mph NNW 84%
8 AM 18° Mostly Cloudy 3% 6 mph N 82%
9 AM 19° Partly Cloudy 6% 6 mph N 75%
10 AM 21° Partly Cloudy 6% 6 mph N 67%
11 AM 22° Mostly Clear 6% 6 mph N 61%
12 PM 23° Partly Cloudy 6% 4 mph NNE 59%
1 PM 26° Partly Cloudy 6% 4 mph NE 57%
2 PM 26° Mostly Cloudy 5% 4 mph ENE 55%
3 PM 27° Partly Cloudy 14% 4 mph ENE 54%
4 PM 27° Partly Cloudy 32% 4 mph ENE 53%
5 PM 26° Mostly Clear 32% 4 mph ENE 53%
6 PM 26° Partly Cloudy 36% 4 mph ENE 57%
7 PM 25° Partly Cloudy 36% 4 mph E 62%
8 PM 24° Mostly Cloudy 36% 4 mph E 65%
9 PM 22° Overcast 40% 4 mph E 69%
15-Day Forecast
Today
8/20
Mostly Clear
4%
17°
31°
Fri
8/21
Partly Cloudy
50%
17°
28°
Sat
8/22
Overcast
81%
20°
25°
Sun
8/23
Mostly Cloudy
28%
20°
31°
Mon
8/24
Clear
3%
18°
30°
Tue
8/25
Rain
61%
19°
31°
Wed
8/26
Heavy Rain
82%
19°
31°
Thu
8/27
Rain
82%
19°
29°
Fri
8/28
Rain
68%
20°
32°
Sat
8/29
Rain
68%
21°
33°
Sun
8/30
Clear
60%
21°
33°
Mon
8/31
Drizzle
60%
22°
32°
Tue
9/1
Drizzle
60%
21°
31°
Wed
9/2
Drizzle
60%
20°
31°
Thu
9/3
Drizzle
60%
20°
31°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.6 µg/m³
O3
Ground-level ozone
40 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 40 52
Sat 42 Good 42 33
Sun 38 Good 38 34
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE13 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index4.0
Kinematics
0–6 km Shear32 kt
0–1 km Shear14 kt
Eff. Shear—
0–1 km SRH-83
0–3 km SRH-14
Eff. SRH—
Storm Motion300° @ 30 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index32.5
Thermo & Levels
PWAT1.77 in
0–3 km LR4.5 °C/km
700–500 LR5.0 °C/km
Total Totals41.2
LCL965 hPa
LFC—
EL—
Freezing Lvl14,692 ft