Butler, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Butler, a city in Butler County, Pennsylvania.
This Afternoon
77°F
Sunny
Sunny. High near 77, with temperatures falling to around 70 in the afternoon. South wind 1 to 5 mph.
7-day forecast for Butler
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Sunny | 1 to 5 mph S | 1% |
| Tonight | 51°F | Mostly Clear | 3 mph SE | 3% |
| Wednesday | 76°F | Partly Sunny | 3 to 8 mph SE | 10% |
| Wednesday Night | 59°F | Light Rain | 8 mph S | 100% |
| Thursday | 69°F | Chance Light Rain | 6 to 12 mph SW | 30% |
| Thursday Night | 45°F | Partly Cloudy | 0 to 5 mph W | 2% |
| Friday | 64°F | Partly Sunny | 0 to 6 mph W | 12% |
| Friday Night | 42°F | Chance Light Rain | 5 mph NW | 30% |
| Saturday | 55°F | Chance Light Rain | 5 to 10 mph W | 30% |
| Saturday Night | 34°F | Chance Light Rain then Mostly Cloudy | 3 to 7 mph W | 29% |
| Sunday | 55°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph SW | 17% |
| Sunday Night | 32°F | Slight Chance Light Rain | 8 mph W | 21% |
| Monday | 56°F | Chance Light Rain | 8 to 13 mph W | 32% |
| Monday Night | 33°F | Chance Light Rain then Partly Cloudy | 6 to 9 mph SW | 32% |
Forecast source: National Weather Service (api.weather.gov) for Butler (40.862, -79.896). Updated through the day.
Growing snapshot for Butler
Last spring frost
May 7
First fall frost
Oct 14
Growing season
159 days
Hardiness zone
6b
More local growing data for Butler: nearby ZIP 16045 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Butler 2 Sw, Pa (0.8 mi from Butler). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.