Big Run, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Run, a borough in Jefferson County, Pennsylvania.
This Afternoon
77°F
Mostly Sunny
Mostly sunny. High near 77, with temperatures falling to around 71 in the afternoon. South wind 3 to 7 mph.
7-day forecast for Big Run
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Mostly Sunny | 3 to 7 mph S | 2% |
| Tonight | 50°F | Mostly Clear | 5 mph SE | 2% |
| Wednesday | 75°F | Partly Sunny | 5 to 8 mph SE | 3% |
| Wednesday Night | 59°F | Light Rain | 9 mph S | 99% |
| Thursday | 69°F | Light Rain Likely | 6 to 12 mph SW | 65% |
| Thursday Night | 47°F | Mostly Cloudy | 1 to 5 mph SW | 9% |
| Friday | 64°F | Partly Sunny | 1 to 5 mph W | 14% |
| Friday Night | 43°F | Chance Light Rain | 1 to 5 mph NW | 25% |
| Saturday | 55°F | Chance Light Rain | 5 to 10 mph W | 34% |
| Saturday Night | 36°F | Chance Light Rain then Mostly Cloudy | 7 mph W | 34% |
| Sunday | 54°F | Partly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 17% |
| Sunday Night | 34°F | Slight Chance Light Rain | 7 to 10 mph W | 23% |
| Monday | 54°F | Chance Light Rain | 10 to 14 mph W | 33% |
| Monday Night | 35°F | Chance Light Rain | 7 to 12 mph SW | 33% |
Forecast source: National Weather Service (api.weather.gov) for Big Run (40.971, -78.877). Updated through the day.
Growing snapshot for Big Run
Last spring frost
May 6
First fall frost
Oct 14
Growing season
160 days
Hardiness zone
6a
More local growing data for Big Run: nearby ZIP 15715 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Brockway
Brookville
Corsica
Falls Creek
Punxsutawney
Reynoldsville
Summerville
Sykesville
Timblin
Worthville
Climate data from the nearest NOAA station, Dubois Jefferson Co Ap, Pa (14.4 mi from Big Run). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.