Johnstown, PA Weather & Growing Conditions
Tonight
49°F
Mostly Clear
Mostly clear, with a low around 49. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear | 5 mph SE | 2% |
| Wednesday | 74°F | Partly Sunny | 2 to 9 mph SE | 2% |
| Wednesday Night | 59°F | Rain Showers | 5 to 9 mph S | 99% |
| Thursday | 69°F | Rain Showers Likely | 3 to 9 mph SW | 67% |
| Thursday Night | 49°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph W | 17% |
| Friday | 64°F | Slight Chance Rain Showers | 0 to 5 mph NW | 23% |
| Friday Night | 43°F | Chance Rain Showers | 2 mph NW | 33% |
| Saturday | 53°F | Chance Rain Showers | 3 to 10 mph W | 34% |
| Saturday Night | 36°F | Chance Rain Showers | 3 to 7 mph W | 34% |
| Sunday | 53°F | Slight Chance Rain Showers | 3 to 10 mph W | 22% |
| Sunday Night | 34°F | Slight Chance Rain Showers | 8 mph W | 23% |
| Monday | 52°F | Chance Rain Showers | 8 to 15 mph W | 33% |
| Monday Night | 35°F | Chance Rain Showers | 9 mph W | 33% |
| Tuesday | 57°F | Slight Chance Rain Showers then Mostly Sunny | 9 to 17 mph W | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Johnstown, PA
Last spring frost
Apr 29
First fall frost
Oct 21
Growing season
176 days
Hardiness zone
6b
Explore more for Johnstown, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Johnstown Cambria Co Ap, Pa (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.