Jonestown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jonestown, a community in Columbia County, Pennsylvania.
Today
83°F
Areas Of Fog then Sunny
Areas of fog before 10am. Sunny, with a high near 83. North wind around 1 mph.
7-day forecast for Jonestown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Areas Of Fog then Sunny | 1 mph N | 0% |
| Tonight | 62°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 82°F | Patchy Fog then Chance Showers And Thunderstorms | 0 to 3 mph SE | 48% |
| Wednesday Night | 68°F | Showers And Thunderstorms Likely | 2 mph E | 58% |
| Thursday | 86°F | Showers And Thunderstorms | 0 to 5 mph SW | 84% |
| Thursday Night | 68°F | Showers And Thunderstorms | 2 mph SW | 84% |
| Friday | 85°F | Showers And Thunderstorms | 0 to 5 mph NW | 75% |
| Friday Night | 67°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 mph W | 75% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 59% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 2 mph W | 59% |
| Sunday | 86°F | Mostly Sunny | 1 to 5 mph W | 13% |
| Sunday Night | 67°F | Mostly Clear | 3 mph W | 13% |
| Monday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph W | 28% |
| Monday Night | 66°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph W | 28% |
Forecast source: National Weather Service (api.weather.gov) for Jonestown (41.127, -76.309). Updated through the day.
Growing snapshot for Jonestown
Last spring frost
May 4
First fall frost
Oct 11
Growing season
159 days
Hardiness zone
6b
More local growing data for Jonestown: nearby ZIP 17878 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Benton 3 Ne, Pa (4 mi from Jonestown). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.