Defiance, PA Weather & Growing Conditions
This Afternoon
78°F
Partly Sunny
Partly sunny, with a high near 78. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Partly Sunny | 5 mph N | 6% |
| Tonight | 54°F | Partly Cloudy then Patchy Fog | 3 mph NE | 0% |
| Saturday | 74°F | Patchy Fog then Partly Sunny | 3 mph E | 3% |
| Saturday Night | 63°F | Chance Rain Showers | 3 to 7 mph SE | 40% |
| Sunday | 76°F | Showers And Thunderstorms | 2 to 7 mph SW | 96% |
| Sunday Night | 58°F | Showers And Thunderstorms | 1 to 7 mph NW | 96% |
| Monday | 67°F | Chance Rain Showers | 7 mph NE | 40% |
| Monday Night | 55°F | Rain Showers Likely | 7 mph E | 71% |
| Tuesday | 60°F | Showers And Thunderstorms Likely | 7 mph E | 72% |
| Tuesday Night | 50°F | Rain Showers Likely | 7 mph E | 72% |
| Wednesday | 57°F | Rain Showers Likely | 7 mph E | 63% |
| Wednesday Night | 50°F | Showers And Thunderstorms Likely | 5 mph E | 58% |
| Thursday | 60°F | Chance Showers And Thunderstorms | 5 mph NE | 53% |
| Thursday Night | 50°F | Chance Rain Showers | 3 mph NE | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Defiance, PA
Last spring frost
Apr 23
First fall frost
Oct 21
Growing season
177 days
Hardiness zone
6b
Explore more for Defiance, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Altoona Blair Co Ap, Pa (10.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.