Harrisville, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisville, a borough in Butler County, Pennsylvania.
Tonight
55°F
Partly Cloudy
Partly cloudy, with a low around 55. Northeast wind around 6 mph.
7-day forecast for Harrisville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Partly Cloudy | 6 mph NE | 5% |
| Saturday | 75°F | Partly Sunny then Slight Chance Rain Showers | 7 mph E | 18% |
| Saturday Night | 61°F | Mostly Cloudy then Chance Showers And Thunderstorms | 6 mph SE | 76% |
| Sunday | 74°F | Showers And Thunderstorms | 8 mph SW | 92% |
| Sunday Night | 54°F | Rain Showers Likely | 9 mph N | 66% |
| Monday | 68°F | Slight Chance Rain Showers | 12 mph NE | 18% |
| Monday Night | 53°F | Chance Rain Showers | 13 mph E | 52% |
| Tuesday | 64°F | Rain Showers Likely | 14 mph E | 56% |
| Tuesday Night | 51°F | Showers And Thunderstorms Likely | 16 mph E | 61% |
| Wednesday | 62°F | Rain Showers Likely | 15 mph E | 61% |
| Wednesday Night | 50°F | Chance Showers And Thunderstorms | 12 to 15 mph E | 54% |
| Thursday | 64°F | Chance Rain Showers | 8 to 12 mph E | 43% |
| Thursday Night | 50°F | Slight Chance Rain Showers | 7 mph NE | 19% |
| Friday | 70°F | Partly Sunny then Slight Chance Rain Showers | 8 mph NE | 17% |
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 Sep 19, 2026.