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Prospect, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Prospect, a borough in Butler County, Pennsylvania.

This Afternoon
70°F
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 70. East wind around 3 mph. Chance of precipitation is 20%.

7-day forecast for Prospect

WhenTempForecastWindPrecip
This Afternoon 70°F Slight Chance Rain Showers 3 mph E 18%
Tonight 62°F Rain Showers 5 mph SE 78%
Sunday 75°F Showers And Thunderstorms 5 to 8 mph W 98%
Sunday Night 52°F Chance Showers And Thunderstorms 8 mph N 28%
Monday 69°F Chance Rain Showers 9 mph NE 25%
Monday Night 51°F Chance Rain Showers 8 to 12 mph E 48%
Tuesday 64°F Chance Rain Showers 14 mph E 53%
Tuesday Night 50°F Rain Showers Likely 15 mph E 69%
Wednesday 62°F Rain Showers Likely 15 mph E 69%
Wednesday Night 49°F Chance Rain Showers 14 mph E 52%
Thursday 64°F Chance Rain Showers 8 to 12 mph E 52%
Thursday Night 48°F Mostly Cloudy 7 mph E 14%
Friday 69°F Partly Sunny 7 mph NE 13%
Friday Night 48°F Partly Cloudy 6 mph NE 12%

Forecast source: National Weather Service (api.weather.gov) for Prospect (40.899, -80.049). Updated through the day.

Growing snapshot for Prospect

Last spring frost
May 7
First fall frost
Oct 14
Growing season
159 days
Hardiness zone
6a

More local growing data for Prospect: nearby ZIP 16052 weather · frost dates · planting calendar · Pennsylvania frost dates

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Climate data from the nearest NOAA station, Butler 2 Sw, Pa (8.6 mi from Prospect). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.