Mifflin, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mifflin, a borough in Juniata County, Pennsylvania.
Today
85°F
Patchy Fog then Sunny
Patchy fog before 10am. Sunny, with a high near 85. East wind around 1 mph.
7-day forecast for Mifflin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Patchy Fog then Sunny | 1 mph E | 0% |
| Tonight | 64°F | Mostly Cloudy then Areas Of Fog | 1 mph NE | 6% |
| Wednesday | 83°F | Patchy Fog then Partly Sunny | 2 mph E | 24% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms | 1 mph NE | 49% |
| Thursday | 88°F | Areas Of Fog then Showers And Thunderstorms | 0 to 3 mph SW | 77% |
| Thursday Night | 70°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 1 mph NW | 77% |
| Friday | 87°F | Showers And Thunderstorms Likely | 2 mph W | 68% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 mph NW | 68% |
| Saturday | 85°F | Partly Sunny then Showers And Thunderstorms Likely | 0 to 3 mph W | 55% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 1 mph NW | 55% |
| Sunday | 88°F | Mostly Sunny | 0 to 3 mph W | 13% |
| Sunday Night | 69°F | Partly Cloudy | 2 mph W | 13% |
| Monday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 6 mph W | 22% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph W | 22% |
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 Aug 4, 2026.