Mifflin, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mifflin, a borough in Juniata County, Pennsylvania.
This Afternoon
80°F
Mostly Sunny
Mostly sunny, with a high near 80. North wind around 3 mph.
7-day forecast for Mifflin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Mostly Sunny | 3 mph N | 0% |
| Tonight | 52°F | Partly Cloudy then Areas Of Fog | 3 mph W | 0% |
| Saturday | 74°F | Areas Of Fog then Mostly Sunny | 2 mph E | 3% |
| Saturday Night | 62°F | Mostly Cloudy then Rain Showers Likely | 1 to 5 mph SE | 60% |
| Sunday | 75°F | Showers And Thunderstorms | 3 mph S | 98% |
| Sunday Night | 57°F | Showers And Thunderstorms | 1 to 5 mph NW | 93% |
| Monday | 68°F | Chance Rain Showers | 5 mph NE | 32% |
| Monday Night | 54°F | Rain Showers Likely | 3 to 7 mph NE | 61% |
| Tuesday | 62°F | Rain Showers Likely | 7 mph E | 64% |
| Tuesday Night | 50°F | Rain Showers Likely | 7 mph E | 64% |
| Wednesday | 60°F | Chance Rain Showers | 3 to 7 mph E | 53% |
| Wednesday Night | 49°F | Chance Showers And Thunderstorms | 5 mph NE | 51% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 5 mph NE | 49% |
| Thursday Night | 50°F | Chance Showers And Thunderstorms | 2 mph NE | 39% |
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 Sep 18, 2026.