Renfrew, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Renfrew, a community in Butler County, Pennsylvania.
Overnight
56°F
Mostly Cloudy
Mostly cloudy, with a low around 56. Northeast wind around 6 mph.
7-day forecast for Renfrew
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Mostly Cloudy | 6 mph NE | 1% |
| Saturday | 77°F | Mostly Cloudy | 6 mph E | 3% |
| Saturday Night | 62°F | Showers And Thunderstorms | 5 mph SE | 78% |
| Sunday | 76°F | Showers And Thunderstorms | 8 mph SW | 94% |
| Sunday Night | 51°F | Rain Showers Likely then Mostly Cloudy | 9 mph N | 56% |
| Monday | 68°F | Chance Rain Showers | 10 mph NE | 31% |
| Monday Night | 50°F | Rain Showers Likely | 9 to 13 mph E | 59% |
| Tuesday | 62°F | Rain Showers Likely | 14 mph E | 59% |
| Tuesday Night | 48°F | Rain Showers Likely | 15 mph E | 59% |
| Wednesday | 63°F | Rain Showers Likely | 15 mph E | 59% |
| Wednesday Night | 48°F | Showers And Thunderstorms Likely | 13 mph E | 62% |
| Thursday | 66°F | Rain Showers Likely | 12 mph E | 61% |
| Thursday Night | 48°F | Slight Chance Rain Showers | 5 to 9 mph E | 24% |
| Friday | 69°F | Partly Sunny then Slight Chance Rain Showers | 7 mph NE | 16% |
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 Sep 19, 2026.