Mifflin, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mifflin, a borough in Juniata County, Pennsylvania.
This Afternoon
70°F
Mostly Cloudy
Mostly cloudy, with a high near 70. Wind around 0 mph.
7-day forecast for Mifflin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Mostly Cloudy | 0 mph | 1% |
| Tonight | 47°F | Areas Of Fog | 0 mph | 2% |
| Wednesday | 75°F | Areas Of Fog then Mostly Sunny | 0 to 6 mph S | 2% |
| Wednesday Night | 59°F | Mostly Cloudy then Rain Showers | 2 mph SE | 89% |
| Thursday | 73°F | Rain Showers | 0 to 5 mph S | 82% |
| Thursday Night | 53°F | Mostly Cloudy then Chance Rain Showers | 0 mph | 31% |
| Friday | 69°F | Chance Rain Showers | 0 mph | 40% |
| Friday Night | 45°F | Chance Rain Showers | 0 mph | 37% |
| Saturday | 62°F | Slight Chance Rain Showers | 1 to 6 mph NW | 18% |
| Saturday Night | 38°F | Partly Cloudy | 3 mph NW | 11% |
| Sunday | 59°F | Mostly Sunny | 1 to 5 mph W | 8% |
| Sunday Night | 35°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph W | 17% |
| Monday | 59°F | Slight Chance Rain Showers | 3 to 8 mph W | 23% |
| Monday Night | 34°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph W | 21% |
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.