Klahr, PA Weather & Growing Conditions
Tonight
49°F
Mostly Clear
Mostly clear, with a low around 49. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear | 7 mph S | 0% |
| Wednesday | 72°F | Partly Sunny | 6 to 10 mph S | 0% |
| Wednesday Night | 58°F | Rain Showers | 9 to 13 mph S | 98% |
| Thursday | 71°F | Rain Showers Likely | 5 to 9 mph SW | 65% |
| Thursday Night | 52°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph W | 21% |
| Friday | 64°F | Chance Rain Showers | 3 mph W | 35% |
| Friday Night | 46°F | Slight Chance Rain Showers | 6 mph NW | 22% |
| Saturday | 54°F | Chance Rain Showers | 7 to 12 mph NW | 25% |
| Saturday Night | 39°F | Slight Chance Rain Showers then Partly Cloudy | 12 mph NW | 21% |
| Sunday | 53°F | Mostly Sunny | 10 mph W | 10% |
| Sunday Night | 38°F | Partly Cloudy then Slight Chance Rain Showers | 10 to 16 mph W | 19% |
| Monday | 53°F | Chance Rain Showers | 15 mph W | 28% |
| Monday Night | 39°F | Chance Rain Showers | 13 to 16 mph W | 28% |
| Tuesday | 57°F | Mostly Sunny | 17 mph W | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Klahr, PA
Last spring frost
Apr 23
First fall frost
Oct 21
Growing season
177 days
Hardiness zone
6b
Explore more for Klahr, 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.