Jonestown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jonestown, a community in Columbia County, Pennsylvania.
Overnight
49°F
Partly Cloudy
Partly cloudy, with a low around 49. Northeast wind around 3 mph.
7-day forecast for Jonestown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Partly Cloudy | 3 mph NE | 0% |
| Saturday | 71°F | Mostly Sunny | 2 mph SE | 1% |
| Saturday Night | 55°F | Rain Showers | 2 to 7 mph SE | 91% |
| Sunday | 68°F | Rain Showers | 3 to 7 mph S | 100% |
| Sunday Night | 50°F | Rain Showers | 3 to 7 mph NW | 88% |
| Monday | 66°F | Partly Sunny | 7 mph N | 2% |
| Monday Night | 46°F | Mostly Cloudy then Chance Rain Showers | 6 mph NE | 35% |
| Tuesday | 60°F | Chance Rain Showers | 6 mph E | 36% |
| Tuesday Night | 44°F | Chance Rain Showers | 5 to 12 mph E | 30% |
| Wednesday | 61°F | Chance Rain Showers | 7 to 12 mph E | 30% |
| Wednesday Night | 45°F | Chance Rain Showers | 7 to 10 mph E | 38% |
| Thursday | 61°F | Chance Rain Showers | 5 to 10 mph NE | 38% |
| Thursday Night | 45°F | Chance Rain Showers | 6 mph NE | 34% |
| Friday | 65°F | Slight Chance Rain Showers | 6 mph N | 24% |
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 Sep 19, 2026.