Forest Lake, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Forest Lake, a community in Susquehanna County, Pennsylvania.
Overnight
47°F
Mostly Clear
Mostly clear, with a low around 47. South wind around 5 mph.
7-day forecast for Forest Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Clear | 5 mph S | 2% |
| Wednesday | 71°F | Mostly Sunny | 5 to 8 mph S | 2% |
| Wednesday Night | 55°F | Mostly Cloudy then Light Rain Likely | 7 to 10 mph S | 56% |
| Thursday | 68°F | Light Rain | 6 to 10 mph S | 98% |
| Thursday Night | 49°F | Mostly Cloudy | 5 mph SW | 12% |
| Friday | 64°F | Mostly Cloudy | 3 mph S | 13% |
| Friday Night | 43°F | Mostly Cloudy then Slight Chance Light Rain | 3 mph NW | 16% |
| Saturday | 56°F | Chance Light Rain | 3 to 7 mph W | 46% |
| Saturday Night | 38°F | Chance Light Rain | 9 mph NW | 46% |
| Sunday | 53°F | Slight Chance Light Rain then Mostly Sunny | 8 mph NW | 15% |
| Sunday Night | 34°F | Partly Cloudy | 8 mph W | 9% |
| Monday | 53°F | Slight Chance Light Rain | 7 to 10 mph W | 19% |
| Monday Night | 32°F | Slight Chance Light Rain then Partly Cloudy | 6 mph W | 19% |
| Tuesday | 56°F | Mostly Sunny | 6 to 9 mph SW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Forest Lake (41.888, -75.959). Updated through the day.
Growing snapshot for Forest Lake
Last spring frost
May 14
First fall frost
Oct 2
Growing season
141 days
Hardiness zone
5b
More local growing data for Forest Lake: nearby ZIP 18801 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Browndale
Forest City
Friendsville
Great Bend
Hallstead
Harford
Hop Bottom
Lakeside
Lanesboro
Laurel Lake
Little Meadows
Meshoppen
Montrose
New Milford
Nicholson
Oakland
South Montrose
Springville
Susquehanna Depot
Thompson
Union Dale
Vandling
Climate data from the nearest NOAA station, Montrose, Pa (4.5 mi from Forest Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.