Cheswick, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cheswick, a borough in Allegheny County, Pennsylvania.
This Afternoon
80°F
Sunny
Sunny. High near 80, with temperatures falling to around 73 in the afternoon. Southeast wind 0 to 3 mph.
7-day forecast for Cheswick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 0 to 3 mph SE | 1% |
| Tonight | 51°F | Mostly Clear | 5 mph SE | 2% |
| Wednesday | 78°F | Partly Sunny | 2 to 9 mph SE | 7% |
| Wednesday Night | 61°F | Light Rain | 9 mph S | 97% |
| Thursday | 72°F | Chance Light Rain | 7 to 14 mph SW | 42% |
| Thursday Night | 48°F | Partly Cloudy | 0 to 6 mph SW | 4% |
| Friday | 66°F | Partly Sunny | 1 to 7 mph W | 11% |
| Friday Night | 44°F | Chance Light Rain | 2 to 7 mph NW | 27% |
| Saturday | 57°F | Chance Light Rain | 7 to 13 mph W | 29% |
| Saturday Night | 36°F | Chance Light Rain then Mostly Cloudy | 3 to 9 mph W | 25% |
| Sunday | 56°F | Partly Sunny then Slight Chance Light Rain | 5 to 12 mph SW | 17% |
| Sunday Night | 35°F | Slight Chance Light Rain | 10 mph W | 21% |
| Monday | 57°F | Chance Light Rain | 10 to 17 mph W | 31% |
| Monday Night | 36°F | Chance Light Rain then Partly Cloudy | 9 to 13 mph SW | 31% |
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 Nov 4, 2026.