Charleroi, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charleroi, a borough in Westmoreland County, Pennsylvania.
Overnight
53°F
Mostly Clear
Mostly clear, with a low around 53. South wind around 5 mph.
7-day forecast for Charleroi
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 78°F | Partly Sunny | 3 to 9 mph S | 12% |
| Wednesday Night | 60°F | Light Rain | 12 mph S | 97% |
| Thursday | 69°F | Chance Light Rain then Partly Sunny | 8 to 14 mph SW | 49% |
| Thursday Night | 48°F | Partly Cloudy | 3 to 7 mph SW | 2% |
| Friday | 63°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph SW | 20% |
| Friday Night | 42°F | Chance Light Rain | 5 to 9 mph W | 32% |
| Saturday | 56°F | Chance Light Rain | 6 to 12 mph W | 31% |
| Saturday Night | 38°F | Chance Light Rain then Mostly Cloudy | 3 to 8 mph W | 28% |
| Sunday | 55°F | Partly Sunny then Slight Chance Light Rain | 5 to 12 mph SW | 16% |
| Sunday Night | 36°F | Slight Chance Light Rain | 9 mph SW | 23% |
| Monday | 56°F | Chance Light Rain | 9 to 14 mph W | 31% |
| Monday Night | 37°F | Chance Light Rain then Partly Cloudy | 9 to 14 mph SW | 31% |
| Tuesday | 59°F | Mostly Sunny | 14 to 18 mph SW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Charleroi (40.138, -79.900). Updated through the day.
Growing snapshot for Charleroi
Last spring frost
Apr 13
First fall frost
Nov 5
Growing season
205 days
Hardiness zone
6b
More local growing data for Charleroi: nearby ZIP 15062 weather · frost dates · planting calendar · Pennsylvania frost dates
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Level Green
Climate data from the nearest NOAA station, Charleroi Lock 4, Pa (0.9 mi from Charleroi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.