Imperial, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Imperial, a community in Allegheny County, Pennsylvania.
Tonight
55°F
Mostly Clear
Mostly clear, with a low around 55. South wind 2 to 6 mph.
7-day forecast for Imperial
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Clear | 2 to 6 mph S | 2% |
| Wednesday | 76°F | Mostly Cloudy | 5 to 10 mph S | 11% |
| Wednesday Night | 60°F | Light Rain | 9 to 13 mph S | 100% |
| Thursday | 69°F | Chance Light Rain then Mostly Sunny | 7 to 13 mph SW | 25% |
| Thursday Night | 48°F | Partly Cloudy | 1 to 6 mph SW | 3% |
| Friday | 64°F | Partly Sunny | 1 to 7 mph W | 10% |
| Friday Night | 44°F | Slight Chance Light Rain | 6 mph NW | 24% |
| Saturday | 55°F | Chance Light Rain | 6 to 10 mph W | 28% |
| Saturday Night | 38°F | Chance Light Rain then Mostly Cloudy | 3 to 7 mph W | 26% |
| Sunday | 54°F | Partly Sunny then Slight Chance Light Rain | 3 to 10 mph W | 15% |
| Sunday Night | 37°F | Slight Chance Light Rain | 9 mph W | 18% |
| Monday | 56°F | Chance Light Rain | 9 to 13 mph W | 26% |
| Monday Night | 38°F | Chance Light Rain then Partly Cloudy | 8 to 13 mph SW | 26% |
| Tuesday | 59°F | Mostly Sunny | 12 to 16 mph W | 8% |
Forecast source: National Weather Service (api.weather.gov) for Imperial (40.454, -80.250). Updated through the day.
Growing snapshot for Imperial
Last spring frost
Apr 23
First fall frost
Oct 23
Growing season
181 days
Hardiness zone
6b
More local growing data for Imperial: nearby ZIP 15126 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Pittsburgh Intl Ap, Pa (4.2 mi from Imperial). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.