Casselman, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casselman, a borough in Somerset County, Pennsylvania.
Today
79°F
Mostly Sunny
Mostly sunny, with a high near 79. Southeast wind around 5 mph.
7-day forecast for Casselman
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Sunny | 5 mph SE | 0% |
| Tonight | 64°F | Mostly Cloudy then Patchy Fog | 1 to 6 mph SE | 2% |
| Wednesday | 80°F | Patchy Fog then Chance Showers And Thunderstorms | 3 mph SE | 55% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Patchy Fog | 3 mph S | 53% |
| Thursday | 81°F | Showers And Thunderstorms | 2 to 6 mph SW | 84% |
| Thursday Night | 67°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph SW | 84% |
| Friday | 81°F | Showers And Thunderstorms | 2 to 6 mph SW | 82% |
| Friday Night | 65°F | Showers And Thunderstorms | 3 mph SW | 82% |
| Saturday | 80°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 50% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 5 mph SW | 50% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 25% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 6 mph W | 25% |
| Monday | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 to 10 mph W | 30% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 to 8 mph W | 41% |
Forecast source: National Weather Service (api.weather.gov) for Casselman (39.885, -79.211). Updated through the day.
Growing snapshot for Casselman
Last spring frost
May 2
First fall frost
Oct 17
Growing season
168 days
Hardiness zone
6a
More local growing data for Casselman: nearby ZIP 15557 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Hidden Valley, Pa (9.1 mi from Casselman). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.