Allegheny County, Pennsylvania, United States

Last updated: 4:07 PM CDT  ·  Refresh
22°C
Feels like 24°
Mostly Cloudy
▲ 23°  /  ▼ 15°
Wind
4 mph NNE
Humidity
82%
Dew Point
20°
Pressure
29.02 inHg
Visibility
8 mi
UV Index
4.4
Cloud Cover
75%
Sunrise
6:35 AM
Sunset
8:10 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Allegheny County is currently mostly cloudy at 22°C. Precipitation is likely — peak probability 60% around 5 PM. Sunrise: 6:35AM · Sunset: 8:10PM.

Alerts

No active alerts for this location.
39 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
59%
6 PM
23°
21%
7 PM
22°
20%
8 PM
21°
16%
9 PM
21°
16%
10 PM
19°
3%
11 PM
18°
3%
12 AM
18°
3%
1 AM
17°
6%
2 AM
17°
6%
3 AM
17°
6%
4 AM
16°
15%
5 AM
16°
15%
6 AM
15°
15%
7 AM
15°
16%
8 AM
16°
16%
9 AM
16°
16%
10 AM
17°
9%
11 AM
18°
19%
12 PM
20°
19%
1 PM
21°
19%
2 PM
23°
19%
3 PM
24°
21%
4 PM
24°
21%
7-Day Forecast
Today
23° 15°
Partly Cloudy with a 59% chance of rain.
Fri
26° 15°
Mostly Clear with a 22% chance of rain.
Sat
29° 17°
Clear with a 64% chance of rain.
Sun
24° 15°
Rain, 60% chance.
Mon
24° 13°
Clear.
Tue
27° 13°
Drizzle, 52% chance.
Wed
26° 16°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Cloudy 59% 4 mph NNE 82%
6 PM 23° Partly Cloudy 21% 5 mph NE 85%
7 PM 22° Partly Cloudy 20% 5 mph NE 87%
8 PM 21° Partly Cloudy 16% 4 mph NE 90%
9 PM 21° Mostly Clear 16% 4 mph ENE 91%
10 PM 19° Mostly Clear 3% 4 mph ENE 93%
11 PM 18° Mostly Clear 3% 4 mph ENE 94%
12 AM 18° Mostly Clear 3% 4 mph ENE 94%
1 AM 17° Partly Cloudy 6% 4 mph NE 95%
2 AM 17° Partly Cloudy 6% 3 mph NE 95%
3 AM 17° Partly Cloudy 6% 3 mph NE 95%
4 AM 16° Partly Cloudy 15% 3 mph NE 95%
5 AM 16° Fog 15% 3 mph NE 95%
6 AM 15° Fog 15% 3 mph ENE 94%
7 AM 15° Fog 16% 4 mph ENE 93%
8 AM 16° Fog 16% 4 mph ENE 91%
9 AM 16° Fog 16% 4 mph ENE 86%
10 AM 17° Fog 9% 5 mph ENE 80%
11 AM 18° Haze 19% 5 mph ENE 76%
12 PM 20° Mostly Clear 19% 5 mph ENE 71%
1 PM 21° Mostly Clear 19% 5 mph ENE 66%
2 PM 23° Clear 19% 5 mph ENE 62%
3 PM 24° Clear 21% 6 mph E 62%
4 PM 24° Clear 21% 6 mph E 62%
15-Day Forecast
Today
8/20
Partly Cloudy
59%
15°
23°
Fri
8/21
Mostly Clear
22%
15°
26°
Sat
8/22
Clear
64%
17°
29°
Sun
8/23
Rain
60%
15°
24°
Mon
8/24
Clear
16%
13°
24°
Tue
8/25
Drizzle
52%
13°
27°
Wed
8/26
Rain
63%
16°
26°
Thu
8/27
Rain
63%
16°
27°
Fri
8/28
Rain
68%
17°
28°
Sat
8/29
Drizzle
51%
18°
29°
Sun
8/30
Drizzle
60%
18°
29°
Mon
8/31
Drizzle
60%
18°
29°
Tue
9/1
Drizzle
60%
18°
28°
Wed
9/2
Drizzle
60%
18°
28°
Thu
9/3
Drizzle
60%
17°
28°
39
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
39 AQI 7.1 µg/m³
O3
Ground-level ozone
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 39 Good 31 39
Sat 37 Good 37 25
Sun 49 Good 44 49
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 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Aug 20, 19:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE592 J/kg
MLCAPE316 J/kg
MUCAPE592 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-2.2
Kinematics
0–6 km Shear37 kt
0–1 km Shear8 kt
Eff. Shear23 kt
0–1 km SRH-19
0–3 km SRH13
Eff. SRH13
Storm Motion319° @ 24 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.1
K-Index34.0
Thermo & Levels
PWAT1.57 in
0–3 km LR6.1 °C/km
700–500 LR5.0 °C/km
Total Totals43.8
LCL947 hPa
LFC983 hPa
EL323 hPa
Freezing Lvl12,972 ft