Canonsburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Canonsburg, a borough in Washington County, Pennsylvania.
This Afternoon
85°F
Sunny
Sunny, with a high near 85. East wind around 5 mph.
7-day forecast for Canonsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 5 mph E | 0% |
| Tonight | 68°F | Mostly Clear | 5 mph SE | 1% |
| Wednesday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph S | 28% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 48% |
| Thursday | 84°F | Showers And Thunderstorms | 3 to 8 mph SW | 76% |
| Thursday Night | 68°F | Showers And Thunderstorms | 2 to 6 mph SW | 76% |
| Friday | 84°F | Showers And Thunderstorms | 3 to 9 mph SW | 83% |
| Friday Night | 66°F | Showers And Thunderstorms | 3 to 7 mph SW | 83% |
| Saturday | 83°F | Showers And Thunderstorms Likely | 5 to 9 mph SW | 55% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely | 3 to 7 mph SW | 55% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 24% |
| Monday | 86°F | Chance Showers And Thunderstorms | 8 to 12 mph SW | 35% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 48% |
Forecast source: National Weather Service (api.weather.gov) for Canonsburg (40.264, -80.187). Updated through the day.
Growing snapshot for Canonsburg
Last spring frost
Apr 24
First fall frost
Oct 23
Growing season
181 days
Hardiness zone
6b
More local growing data for Canonsburg: nearby ZIP 15363 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Washington 3 Ne, Pa (5 mi from Canonsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.