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
46°F
Mostly Cloudy
Mostly cloudy, with a low around 46. Northeast wind around 5 mph.
7-day forecast for Forest Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Mostly Cloudy | 5 mph NE | 0% |
| Saturday | 68°F | Mostly Sunny | 3 mph SE | 0% |
| Saturday Night | 50°F | Mostly Cloudy then Rain | 2 to 10 mph SE | 79% |
| Sunday | 63°F | Rain | 5 to 12 mph S | 96% |
| Sunday Night | 45°F | Chance Rain then Mostly Cloudy | 5 to 8 mph N | 47% |
| Monday | 63°F | Partly Sunny | 8 mph N | 1% |
| Monday Night | 42°F | Mostly Cloudy then Chance Rain Showers | 6 mph NE | 30% |
| Tuesday | 59°F | Chance Rain Showers | 6 mph E | 30% |
| Tuesday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 6 mph E | 20% |
| Wednesday | 60°F | Mostly Cloudy | 8 mph E | 12% |
| Wednesday Night | 41°F | Mostly Cloudy then Slight Chance Rain Showers | 6 mph E | 22% |
| Thursday | 60°F | Chance Rain Showers | 6 mph E | 31% |
| Thursday Night | 41°F | Chance Rain Showers | 6 mph NE | 33% |
| Friday | 62°F | Slight Chance Rain Showers | 7 mph N | 24% |
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 Sep 19, 2026.