Allegheny County, PA Weather Forecast
County weather hub
Sunny
Compare major city weather across Allegheny County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 79.
County Weather Overview
This county weather page brings together forecast coverage for Allegheny County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 77 of 77 mapped cities in Allegheny County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 23 to Apr 26, 2026
- Latest sync
- Apr 20, 2026 2:52 AM EDT
- Forecast office
- PBZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Allegheny County
Friday looks like the warmest upcoming period in Allegheny County at 81 degrees F.
Saturday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Sunday at about 5 to 9 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 20, 2026 2:52 AM EDT
- Coverage
- 4 days
- Time zone
- America/New_York
- Forecast office
- PBZ
- Radar station
- KPBZ
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 55.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81.
A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Rain showers likely before 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 73. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
A chance of rain showers. Partly sunny, with a high near 71.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 23
|
Sunny
|
79°F |
1 to 5 mph
SW
|
|
Thursday Night
Apr 23
|
Partly Cloudy
|
55°F |
3 mph
SW
|
|
Friday
Apr 24
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
81°F |
2 to 8 mph
SW
|
|
Friday Night
Apr 24
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
59°F |
3 to 7 mph
SW
|
|
Saturday
Apr 25
|
Rain Showers Likely
|
73°F |
5 to 8 mph
SW
|
|
Saturday Night
Apr 25
|
Showers And Thunderstorms Likely
|
51°F |
7 mph
NW
|
|
Sunday
Apr 26
|
Chance Rain Showers
|
71°F |
5 to 9 mph
NW
|
Major City Forecasts
Live forecast snapshots for major cities across Allegheny County.
Coverage
Forecast coverage currently spans 77 of 77 mapped cities in Allegheny County.
Largest mapped city population in this region: 299,226.
