Defiance, PA Weather & Growing Conditions
Tonight
49°F
Mostly Clear then Patchy Fog
Patchy fog after 5am. Mostly clear, with a low around 49. South wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear then Patchy Fog | 3 mph S | 1% |
| Wednesday | 73°F | Patchy Fog then Partly Sunny | 1 to 8 mph S | 2% |
| Wednesday Night | 59°F | Mostly Cloudy then Rain Showers | 8 mph S | 97% |
| Thursday | 74°F | Rain Showers Likely | 2 to 6 mph SW | 62% |
| Thursday Night | 52°F | Mostly Cloudy then Chance Rain Showers | 2 mph W | 25% |
| Friday | 68°F | Chance Rain Showers | 2 mph NW | 39% |
| Friday Night | 44°F | Chance Rain Showers then Mostly Cloudy | 2 mph NW | 30% |
| Saturday | 59°F | Slight Chance Rain Showers | 2 to 9 mph NW | 17% |
| Saturday Night | 37°F | Slight Chance Rain Showers then Partly Cloudy | 2 to 6 mph NW | 16% |
| Sunday | 58°F | Mostly Sunny | 2 to 7 mph W | 8% |
| Sunday Night | 35°F | Partly Cloudy then Slight Chance Rain Showers | 6 mph W | 16% |
| Monday | 57°F | Chance Rain Showers | 6 to 12 mph W | 25% |
| Monday Night | 36°F | Slight Chance Rain Showers then Partly Cloudy | 6 mph W | 22% |
| Tuesday | 61°F | Mostly Sunny | 6 to 13 mph W | 7% |
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 Nov 4, 2026.