Harmonsburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harmonsburg, a community in Crawford County, Pennsylvania.
Today
82°F
Sunny
Sunny, with a high near 82. Southeast wind around 3 mph.
7-day forecast for Harmonsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 3 mph SE | 0% |
| Tonight | 62°F | Mostly Clear | 5 mph SE | 0% |
| Wednesday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 mph S | 47% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms | 5 mph SE | 47% |
| Thursday | 84°F | Showers And Thunderstorms Likely | 3 to 7 mph SW | 61% |
| Thursday Night | 66°F | Showers And Thunderstorms Likely | 5 mph SW | 61% |
| Friday | 82°F | Showers And Thunderstorms Likely | 6 mph SW | 74% |
| Friday Night | 65°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph SW | 74% |
| Saturday | 83°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 8 mph SW | 40% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 40% |
| Sunday | 86°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 23% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 8 mph SW | 39% |
| Monday | 84°F | Chance Rain Showers | 7 to 12 mph SW | 48% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 53% |
Forecast source: National Weather Service (api.weather.gov) for Harmonsburg (41.666, -80.314). Updated through the day.
Growing snapshot for Harmonsburg
Last spring frost
Apr 30
First fall frost
Oct 23
Growing season
175 days
Hardiness zone
6a
More local growing data for Harmonsburg: nearby ZIP 16422 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Adamsville
Atlantic
Blooming Valley
Cambridge Springs
Centerville
Cochranton
Conneaut Lake
Conneaut Lakeshore
Conneautville
Fredericksburg
Geneva
Guys Mills
Hartstown
Hydetown
Jamestown
Kerrtown
Lincolnville
Linesville
Meadville
Pymatuning Central
Pymatuning North
Pymatuning South
Riceville
Rockdale Acres
Saegertown
Spartansburg
Springboro
Townville
Venango
Woodcock
Climate data from the nearest NOAA station, Port Meadville Ap, Pa (5.7 mi from Harmonsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.