Deer Lake, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Deer Lake, a community in Fayette County, Pennsylvania.
Today
83°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 83. Southeast wind around 3 mph.
7-day forecast for Deer Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Patchy Fog then Sunny | 3 mph SE | 0% |
| Tonight | 63°F | Partly Cloudy then Patchy Fog | 3 mph SE | 1% |
| Wednesday | 83°F | Patchy Fog then Scattered Showers And Thunderstorms | 2 mph SE | 32% |
| Wednesday Night | 65°F | Scattered Showers And Thunderstorms | 2 mph SE | 44% |
| Thursday | 82°F | Showers And Thunderstorms | 1 to 6 mph SW | 81% |
| Thursday Night | 65°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph SW | 81% |
| Friday | 82°F | Showers And Thunderstorms | 5 mph SW | 84% |
| Friday Night | 63°F | Showers And Thunderstorms | 3 mph SW | 84% |
| Saturday | 81°F | Showers And Thunderstorms Likely | 2 to 6 mph SW | 68% |
| Saturday Night | 63°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 mph SW | 68% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 30% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 30% |
| Monday | 84°F | Chance Showers And Thunderstorms | 7 mph SW | 40% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 47% |
Forecast source: National Weather Service (api.weather.gov) for Deer Lake (39.847, -79.590). Updated through the day.
Growing snapshot for Deer Lake
Last spring frost
May 19
First fall frost
Oct 1
Growing season
135 days
Hardiness zone
6a
More local growing data for Deer Lake: nearby ZIP 15421 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Chalk Hill 2 Ene, Pa (0.5 mi from Deer Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.