Cheswick, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cheswick, a borough in Allegheny County, Pennsylvania.
Today
87°F
Patchy Fog then Sunny
Patchy fog between 9am and 10am. Sunny, with a high near 87. East wind around 5 mph.
7-day forecast for Cheswick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Patchy Fog then Sunny | 5 mph E | 0% |
| Tonight | 66°F | Mostly Clear | 5 mph E | 1% |
| Wednesday | 88°F | Partly Sunny then Scattered Showers And Thunderstorms | 1 to 6 mph SE | 28% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 5 mph SE | 50% |
| Thursday | 88°F | Showers And Thunderstorms Likely | 2 to 7 mph SW | 72% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely | 2 to 7 mph SW | 72% |
| Friday | 86°F | Showers And Thunderstorms | 3 to 8 mph SW | 81% |
| Friday Night | 67°F | Showers And Thunderstorms | 2 to 7 mph SW | 81% |
| Saturday | 86°F | Showers And Thunderstorms Likely | 5 to 9 mph SW | 56% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 56% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms | 3 to 10 mph SW | 23% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph SW | 23% |
| Monday | 89°F | Chance Showers And Thunderstorms | 8 to 13 mph SW | 40% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 6 to 10 mph SW | 49% |
Forecast source: National Weather Service (api.weather.gov) for Cheswick (40.543, -79.801). Updated through the day.
Growing snapshot for Cheswick
Last spring frost
Apr 16
First fall frost
Nov 1
Growing season
197 days
Hardiness zone
6b
More local growing data for Cheswick: nearby ZIP 15049 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Acmetonia Lock 3, Pa (1.5 mi from Cheswick). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.