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
77°F
Partly Sunny
Partly sunny, with a high near 77. Southeast wind around 3 mph.
7-day forecast for Deer Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Partly Sunny | 3 mph SE | 3% |
| Tonight | 60°F | Mostly Cloudy then Chance Rain Showers | 5 mph SE | 31% |
| Sunday | 76°F | Showers And Thunderstorms | 6 mph SW | 95% |
| Sunday Night | 54°F | Showers And Thunderstorms | 3 mph N | 75% |
| Monday | 67°F | Chance Rain Showers | 2 to 6 mph E | 45% |
| Monday Night | 50°F | Showers And Thunderstorms | 8 mph E | 76% |
| Tuesday | 61°F | Showers And Thunderstorms | 10 mph SE | 76% |
| Tuesday Night | 46°F | Showers And Thunderstorms Likely | 13 mph E | 63% |
| Wednesday | 58°F | Rain Showers Likely | 12 mph SE | 63% |
| Wednesday Night | 47°F | Showers And Thunderstorms Likely | 10 mph SE | 55% |
| Thursday | 63°F | Chance Rain Showers | 8 mph SE | 53% |
| Thursday Night | 46°F | Chance Showers And Thunderstorms | 1 to 6 mph E | 37% |
| Friday | 66°F | Partly Sunny then Chance Rain Showers | 5 mph NE | 25% |
| Friday Night | 45°F | Chance Rain Showers then Partly Cloudy | 1 to 5 mph E | 25% |
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 Sep 19, 2026.