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 72. West wind 1 to 5 mph.
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
- Oct 9 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 11:29 AM EDT
- Forecast office
- PBZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Allegheny County
Saturday looks like the warmest upcoming period in Allegheny County at 78 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Tuesday at about 12 to 17 mph W.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 11:29 AM EDT
- Coverage
- 6 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
Mostly clear, with a low around 50. Northeast wind around 2 mph.
Mostly sunny, with a high near 78. Southeast wind 2 to 7 mph.
A chance of rain showers after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Rain showers before 2pm, then showers and thunderstorms. Cloudy, with a high near 70. Chance of precipitation is 90%.
Showers and thunderstorms. Cloudy, with a low around 60. Chance of precipitation is 90%.
A chance of rain showers before 8am. Mostly cloudy, with a high near 73. Chance of precipitation is 40%.
Mostly cloudy, with a low around 58.
A chance of rain showers after 8am. Partly sunny, with a high near 71. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.
A slight chance of rain showers before 8am. Mostly sunny, with a high near 62.
Partly cloudy, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 9
|
Sunny
|
72°F |
1 to 5 mph
W
|
|
Friday Night
Oct 9
|
Mostly Clear
|
50°F |
2 mph
NE
|
|
Saturday
Oct 10
|
Mostly Sunny
|
78°F |
2 to 7 mph
SE
|
|
Saturday Night
Oct 10
|
Mostly Cloudy then Chance Rain Showers
|
59°F |
5 to 8 mph
SE
|
|
Sunday
Oct 11
|
Rain Showers
|
70°F |
10 mph
SE
|
|
Sunday Night
Oct 11
|
Showers And Thunderstorms
|
60°F |
3 to 10 mph
SE
|
|
Columbus Day
Oct 12
|
Chance Rain Showers then Mostly Cloudy
|
73°F |
3 to 7 mph
W
|
|
Monday Night
Oct 12
|
Mostly Cloudy
|
58°F |
6 to 10 mph
SW
|
|
Tuesday
Oct 13
|
Chance Rain Showers
|
71°F |
12 to 17 mph
W
|
|
Tuesday Night
Oct 13
|
Chance Rain Showers
|
49°F |
10 to 15 mph
NW
|
|
Wednesday
Oct 14
|
Slight Chance Rain Showers then Mostly Sunny
|
62°F |
9 to 14 mph
NW
|
|
Wednesday Night
Oct 14
|
Partly Cloudy
|
44°F |
2 to 10 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.
