Renfrew, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Renfrew, a community in Butler County, Pennsylvania.
Tonight
52°F
Mostly Clear
Mostly clear, with a low around 52. Southeast wind 1 to 5 mph.
7-day forecast for Renfrew
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear | 1 to 5 mph SE | 3% |
| Wednesday | 76°F | Partly Sunny | 3 to 9 mph SE | 10% |
| Wednesday Night | 60°F | Light Rain | 7 to 10 mph S | 100% |
| Thursday | 70°F | Chance Light Rain | 6 to 12 mph SW | 30% |
| Thursday Night | 46°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Friday | 65°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 | 2 to 7 mph W | 29% |
| Sunday | 55°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph W | 17% |
| Sunday Night | 32°F | Slight Chance Light Rain | 8 mph W | 20% |
| Monday | 56°F | Chance Light Rain | 8 to 13 mph W | 31% |
| Monday Night | 34°F | Chance Light Rain then Partly Cloudy | 6 to 9 mph SW | 31% |
| Tuesday | 60°F | Mostly Sunny | 10 to 15 mph W | 11% |
Forecast source: National Weather Service (api.weather.gov) for Renfrew (40.807, -79.962). Updated through the day.
Growing snapshot for Renfrew
Last spring frost
May 7
First fall frost
Oct 14
Growing season
159 days
Hardiness zone
6b
More local growing data for Renfrew: nearby ZIP 16053 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Butler 2 Sw, Pa (4 mi from Renfrew). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.