Stillwater, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Stillwater, a borough in Columbia County, Pennsylvania.
Today
85°F
Areas Of Fog then Sunny
Areas of fog before 10am. Sunny, with a high near 85. Northeast wind around 1 mph.
7-day forecast for Stillwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Areas Of Fog then Sunny | 1 mph NE | 0% |
| Tonight | 61°F | Mostly Cloudy then Patchy Fog | 0 mph | 1% |
| Wednesday | 84°F | Patchy Fog then Chance Showers And Thunderstorms | 0 to 3 mph SE | 46% |
| Wednesday Night | 67°F | Showers And Thunderstorms Likely | 2 mph SE | 59% |
| Thursday | 87°F | Showers And Thunderstorms | 0 to 5 mph S | 84% |
| Thursday Night | 68°F | Showers And Thunderstorms | 2 mph SW | 84% |
| Friday | 87°F | Showers And Thunderstorms | 0 to 5 mph W | 75% |
| Friday Night | 66°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 mph W | 75% |
| Saturday | 85°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 59% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 2 mph W | 59% |
| Sunday | 87°F | Mostly Sunny | 0 to 5 mph W | 13% |
| Sunday Night | 67°F | Mostly Clear | 2 mph W | 13% |
| Monday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 7 mph W | 28% |
| Monday Night | 65°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 1 to 6 mph W | 28% |
Forecast source: National Weather Service (api.weather.gov) for Stillwater (41.153, -76.376). Updated through the day.
Growing snapshot for Stillwater
Last spring frost
May 4
First fall frost
Oct 11
Growing season
159 days
Hardiness zone
6b
More local growing data for Stillwater: nearby ZIP 17859 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Benton 3 Ne, Pa (8.5 mi from Stillwater). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.