Marietta, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a borough in Lancaster County, Pennsylvania.
Tonight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. North wind 5 to 8 mph.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Partly Cloudy | 5 to 8 mph N | 0% |
| Saturday | 77°F | Mostly Sunny | 6 mph E | 3% |
| Saturday Night | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 12 mph SE | 23% |
| Sunday | 78°F | Showers And Thunderstorms | 8 to 14 mph S | 88% |
| Sunday Night | 61°F | Showers And Thunderstorms | 6 to 9 mph NW | 88% |
| Monday | 71°F | Chance Rain Showers | 10 mph NE | 39% |
| Monday Night | 56°F | Chance Rain Showers | 8 to 14 mph NE | 40% |
| Tuesday | 64°F | Chance Rain Showers | 15 mph NE | 54% |
| Tuesday Night | 52°F | Chance Rain Showers | 16 mph NE | 54% |
| Wednesday | 62°F | Chance Rain Showers | 16 mph NE | 46% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms | 12 to 15 mph NE | 47% |
| Thursday | 64°F | Chance Showers And Thunderstorms | 14 mph NE | 46% |
| Thursday Night | 52°F | Chance Showers And Thunderstorms | 6 to 10 mph N | 38% |
| Friday | 69°F | Chance Rain Showers | 12 mph N | 26% |
Forecast source: National Weather Service (api.weather.gov) for Marietta (40.057, -76.552). Updated through the day.
Growing snapshot for Marietta
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
162 days
Hardiness zone
7a
More local growing data for Marietta: nearby ZIP 17547 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Adamstown
Akron
Bainbridge
Bird-in-Hand
Blue Ball
Bowmansville
Brickerville
Brownstown
Cambridge
Churchtown
Clay
Columbia
Conestoga
Denver
East Earl
East Petersburg
Elizabethtown
Ephrata
Falmouth
Farmersville
Fivepointville
Gap
Georgetown
Goodville
Gordonville
Hinkletown
Hopeland
Intercourse
Kirkwood
Lampeter
Climate data from the nearest NOAA station, Landisville 2 Nw, Pa (9 mi from Marietta). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.