Monongahela, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monongahela, a city in Washington County, Pennsylvania.
Today
86°F
Sunny
Sunny, with a high near 86. East wind around 5 mph.
7-day forecast for Monongahela
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 5 mph E | 0% |
| Tonight | 67°F | Partly Cloudy | 1 to 5 mph SE | 1% |
| Wednesday | 87°F | Mostly Sunny then Isolated Showers And Thunderstorms | 1 to 6 mph S | 19% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 2 to 6 mph S | 50% |
| Thursday | 86°F | Showers And Thunderstorms | 3 to 8 mph SW | 75% |
| Thursday Night | 68°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 to 7 mph SW | 75% |
| Friday | 85°F | Showers And Thunderstorms | 3 to 9 mph SW | 83% |
| Friday Night | 67°F | Showers And Thunderstorms | 3 to 7 mph SW | 83% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 5 to 9 mph SW | 59% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 7 mph SW | 59% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 24% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 8 mph SW | 24% |
| Monday | 87°F | Chance Showers And Thunderstorms | 8 to 13 mph SW | 36% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 49% |
Forecast source: National Weather Service (api.weather.gov) for Monongahela (40.191, -79.922). Updated through the day.
Growing snapshot for Monongahela
Last spring frost
Apr 13
First fall frost
Nov 5
Growing season
205 days
Hardiness zone
6b
More local growing data for Monongahela: nearby ZIP 15063 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Aaronsburg
Allenport
Arnold City
Atlasburg
Avella
Baidland
Beallsville
Belle Vernon
Bentleyville
Bulger
Burgettstown
California
Canonsburg
Cecil-Bishop
Claysville
Cokeburg
Cross Creek
Deemston
Donora
Dunlevy
East Marianna
East Washington
Eighty Four
Ellsworth
Elrama
Fairhope
Fayette City
Finleyville
Fredericktown
Green Hills
Climate data from the nearest NOAA station, Charleroi Lock 4, Pa (3.3 mi from Monongahela). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.