Deer Lake, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Deer Lake, a community in Fayette County, Pennsylvania.
Overnight
46°F
Mostly Clear
Mostly clear, with a low around 46. South wind around 5 mph.
7-day forecast for Deer Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 77°F | Partly Sunny | 5 mph S | 2% |
| Wednesday Night | 57°F | Light Rain | 5 mph S | 92% |
| Thursday | 68°F | Light Rain Likely then Partly Sunny | 5 to 8 mph SW | 61% |
| Thursday Night | 47°F | Mostly Cloudy | 3 mph SW | 4% |
| Friday | 62°F | Partly Sunny then Chance Light Rain | 1 to 5 mph SW | 27% |
| Friday Night | 38°F | Chance Light Rain | 3 mph W | 52% |
| Saturday | 50°F | Chance Light Rain | 5 to 8 mph W | 52% |
| Saturday Night | 33°F | Chance Light Rain | 3 to 7 mph W | 44% |
| Sunday | 51°F | Slight Chance Light Rain then Partly Sunny | 3 to 8 mph W | 15% |
| Sunday Night | 30°F | Partly Cloudy | 6 mph W | 9% |
| Monday | 52°F | Mostly Sunny | 5 to 8 mph W | 14% |
| Monday Night | 32°F | Mostly Clear | 6 mph SW | 14% |
| Tuesday | 57°F | Sunny | 6 to 10 mph SW | 5% |
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 Nov 4, 2026.