Marianna, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marianna, a borough in Washington County, Pennsylvania.
Today
79°F
Mostly Sunny
Mostly sunny, with a high near 79. East wind around 3 mph.
7-day forecast for Marianna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Sunny | 3 mph E | 3% |
| Tonight | 64°F | Chance Rain Showers | 2 to 7 mph SE | 52% |
| Sunday | 78°F | Showers And Thunderstorms | 9 mph SW | 94% |
| Sunday Night | 56°F | Showers And Thunderstorms | 6 to 10 mph N | 96% |
| Monday | 67°F | Chance Rain Showers | 10 mph NE | 42% |
| Monday Night | 55°F | Showers And Thunderstorms Likely | 10 mph NE | 73% |
| Tuesday | 64°F | Showers And Thunderstorms Likely | 12 mph E | 73% |
| Tuesday Night | 51°F | Showers And Thunderstorms Likely | 10 to 14 mph E | 67% |
| Wednesday | 62°F | Rain Showers Likely | 12 mph E | 65% |
| Wednesday Night | 51°F | Showers And Thunderstorms Likely | 6 to 12 mph E | 59% |
| Thursday | 66°F | Rain Showers Likely | 9 mph E | 55% |
| Thursday Night | 50°F | Chance Rain Showers | 3 to 8 mph NE | 38% |
| Friday | 67°F | Partly Sunny then Slight Chance Rain Showers | 5 to 8 mph NE | 22% |
| Friday Night | 49°F | Slight Chance Rain Showers then Partly Cloudy | 3 to 8 mph NE | 22% |
Forecast source: National Weather Service (api.weather.gov) for Marianna (40.013, -80.112). Updated through the day.
Growing snapshot for Marianna
Last spring frost
May 3
First fall frost
Oct 15
Growing season
164 days
Hardiness zone
6b
More local growing data for Marianna: nearby ZIP 15345 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
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Atlasburg
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California
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Claysville
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Deemston
Donora
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East Marianna
East Washington
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Fayette City
Finleyville
Fredericktown
Green Hills
Climate data from the nearest NOAA station, Waynesburg 1 E, Pa (9 mi from Marianna). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.