Harrisville, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisville, a borough in Butler County, Pennsylvania.
Overnight
49°F
Mostly Clear
Mostly clear, with a low around 49. Southeast wind around 5 mph.
7-day forecast for Harrisville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Clear | 5 mph SE | 1% |
| Wednesday | 75°F | Partly Sunny then Chance Light Rain | 5 to 12 mph S | 26% |
| Wednesday Night | 58°F | Light Rain | 9 to 13 mph S | 97% |
| Thursday | 66°F | Mostly Sunny | 7 to 13 mph SW | 12% |
| Thursday Night | 44°F | Partly Cloudy | 2 to 6 mph SW | 0% |
| Friday | 60°F | Chance Light Rain | 2 to 8 mph SW | 27% |
| Friday Night | 38°F | Chance Light Rain | 3 to 7 mph W | 52% |
| Saturday | 51°F | Chance Light Rain | 8 to 12 mph W | 46% |
| Saturday Night | 32°F | Chance Light Rain | 6 to 9 mph W | 35% |
| Sunday | 52°F | Slight Chance Light Rain | 7 to 13 mph W | 15% |
| Sunday Night | 30°F | Partly Cloudy | 8 mph W | 9% |
| Monday | 54°F | Slight Chance Light Rain | 7 to 12 mph W | 21% |
| Monday Night | 31°F | Slight Chance Light Rain then Partly Cloudy | 5 to 8 mph SW | 17% |
| Tuesday | 58°F | Mostly Sunny | 8 to 14 mph SW | 7% |
Forecast source: National Weather Service (api.weather.gov) for Harrisville (41.136, -80.011). Updated through the day.
Growing snapshot for Harrisville
Last spring frost
May 7
First fall frost
Oct 14
Growing season
158 days
Hardiness zone
6a
More local growing data for Harrisville: nearby ZIP 16035 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Slippery Rock 1 Ssw, Pa (4.2 mi from Harrisville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.