Slippery Rock, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Slippery Rock, a borough in Butler County, Pennsylvania.
Tonight
61°F
Rain Showers Likely
Rain showers likely between 7pm and 2am, then showers and thunderstorms likely. Mostly cloudy, with a low around 61. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Slippery Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Rain Showers Likely | 5 mph SE | 70% |
| Sunday | 75°F | Showers And Thunderstorms | 6 to 9 mph W | 95% |
| Sunday Night | 51°F | Slight Chance Showers And Thunderstorms | 8 mph NE | 22% |
| Monday | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 10 mph NE | 18% |
| Monday Night | 50°F | Chance Rain Showers | 8 to 13 mph E | 43% |
| Tuesday | 64°F | Chance Rain Showers | 15 mph E | 48% |
| Tuesday Night | 50°F | Rain Showers Likely | 16 mph E | 66% |
| Wednesday | 62°F | Rain Showers Likely | 16 mph E | 66% |
| Wednesday Night | 48°F | Chance Rain Showers | 12 to 15 mph E | 51% |
| Thursday | 65°F | Chance Rain Showers | 8 to 13 mph E | 51% |
| Thursday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 8 mph E | 15% |
| Friday | 69°F | Partly Sunny | 8 mph NE | 13% |
| Friday Night | 47°F | Partly Cloudy | 7 mph NE | 12% |
| Saturday | 71°F | Mostly Sunny | 6 to 9 mph N | 7% |
Forecast source: National Weather Service (api.weather.gov) for Slippery Rock (41.069, -80.058). Updated through the day.
Growing snapshot for Slippery Rock
Last spring frost
May 7
First fall frost
Oct 14
Growing season
158 days
Hardiness zone
6a
More local growing data for Slippery Rock: nearby ZIP 16057 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Slippery Rock 1 Ssw, Pa (1.5 mi from Slippery Rock). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.