Allegheny County, PA Weather Forecast
County weather hub
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Compare major city weather across Allegheny County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms between 8am and 9am, then a chance of showers and thunderstorms between 9am and 10am, then showers and thunderstorms likely between 10am and 4pm, then showers and thunderstorms. Mostly cloudy, with a high near 85. Southwest wind 3 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
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
- Jul 10 to Jul 16, 2026
- Latest sync
- Jul 9, 2026 9:07 PM EDT
- Forecast office
- PBZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Allegheny County
Wednesday looks like the warmest upcoming period in Allegheny County at 92 degrees F.
Saturday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Thursday at about 2 to 10 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 9, 2026 9:07 PM EDT
- Coverage
- 7 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
Showers and thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then showers and thunderstorms likely between 11pm and 1am, then a chance of showers and thunderstorms between 1am and 5am. Mostly cloudy, with a low around 67. West wind 0 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers between 7am and 11am, then showers and thunderstorms likely. Mostly cloudy, with a high near 84. North wind 0 to 6 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms likely before 8pm. Partly cloudy, with a low around 64. Northeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Mostly sunny, with a high near 85.
Partly cloudy, with a low around 65.
Sunny, with a high near 87.
Mostly clear, with a low around 66.
Sunny, with a high near 90.
Mostly clear, with a low around 70.
Mostly sunny, with a high near 92.
Partly cloudy, with a low around 70.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 10
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
85°F |
3 to 9 mph
SW
|
|
Friday Night
Jul 10
|
Showers And Thunderstorms
|
67°F |
0 to 7 mph
W
|
|
Saturday
Jul 11
|
Showers And Thunderstorms Likely
|
84°F |
0 to 6 mph
N
|
|
Saturday Night
Jul 11
|
Showers And Thunderstorms Likely then Partly Cloudy
|
64°F |
6 mph
NE
|
|
Sunday
Jul 12
|
Mostly Sunny
|
85°F |
7 mph
E
|
|
Sunday Night
Jul 12
|
Partly Cloudy
|
65°F |
1 to 6 mph
E
|
|
Monday
Jul 13
|
Sunny
|
87°F |
1 to 5 mph
E
|
|
Monday Night
Jul 13
|
Mostly Clear
|
66°F |
0 to 5 mph
SE
|
|
Tuesday
Jul 14
|
Sunny
|
90°F |
0 to 5 mph
SW
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
5 mph
W
|
|
Wednesday
Jul 15
|
Mostly Sunny
|
92°F |
2 to 9 mph
W
|
|
Wednesday Night
Jul 15
|
Partly Cloudy
|
70°F |
2 to 9 mph
W
|
|
Thursday
Jul 16
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
91°F |
2 to 10 mph
SW
|
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.
