Mifflin, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mifflin, a borough in Juniata County, Pennsylvania.
Overnight
45°F
Patchy Fog
Patchy fog. Mostly clear, with a low around 45. Northeast wind around 1 mph.
7-day forecast for Mifflin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Patchy Fog | 1 mph NE | 0% |
| Wednesday | 75°F | Patchy Fog then Mostly Sunny | 0 to 6 mph E | 1% |
| Wednesday Night | 59°F | Light Rain | 3 mph E | 94% |
| Thursday | 74°F | Light Rain | 1 to 5 mph S | 84% |
| Thursday Night | 50°F | Chance Light Rain then Mostly Cloudy | 0 mph | 27% |
| Friday | 68°F | Partly Sunny | 1 mph NW | 14% |
| Friday Night | 44°F | Partly Cloudy | 1 mph NW | 9% |
| Saturday | 60°F | Slight Chance Light Rain | 1 to 7 mph W | 19% |
| Saturday Night | 38°F | Mostly Cloudy | 6 mph W | 14% |
| Sunday | 59°F | Mostly Sunny | 3 to 7 mph NW | 5% |
| Sunday Night | 35°F | Partly Cloudy | 5 mph W | 7% |
| Monday | 58°F | Mostly Sunny | 3 to 8 mph W | 7% |
| Monday Night | 34°F | Mostly Clear | 5 mph W | 3% |
| Tuesday | 63°F | Mostly Sunny | 2 to 8 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov) for Mifflin (40.569, -77.405). Updated through the day.
Growing snapshot for Mifflin
Last spring frost
Apr 21
First fall frost
Oct 24
Growing season
185 days
Hardiness zone
7a
More local growing data for Mifflin: nearby ZIP 17059 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lewistown, Pa (9.4 mi from Mifflin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.