Lewisburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewisburg, a borough in Northumberland County, Pennsylvania.
Tonight
61°F
Rain Showers
Rain showers. Mostly cloudy, with a low around 61. Southeast wind 1 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Lewisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Rain Showers | 1 to 8 mph SE | 86% |
| Sunday | 74°F | Rain Showers | 3 to 9 mph S | 94% |
| Sunday Night | 53°F | Showers And Thunderstorms Likely then Mostly Cloudy | 3 to 9 mph NW | 68% |
| Monday | 70°F | Partly Sunny then Slight Chance Rain Showers | 8 mph N | 15% |
| Monday Night | 51°F | Chance Rain Showers | 6 mph NE | 52% |
| Tuesday | 64°F | Chance Rain Showers | 6 mph NE | 52% |
| Tuesday Night | 48°F | Chance Rain Showers | 6 mph NE | 39% |
| Wednesday | 62°F | Slight Chance Rain Showers | 8 mph E | 20% |
| Wednesday Night | 48°F | Mostly Cloudy then Slight Chance Rain Showers | 6 mph NE | 19% |
| Thursday | 63°F | Slight Chance Rain Showers | 6 mph NE | 20% |
| Thursday Night | 48°F | Slight Chance Rain Showers | 1 to 5 mph NE | 20% |
| Friday | 66°F | Slight Chance Rain Showers | 5 to 8 mph N | 24% |
| Friday Night | 49°F | Slight Chance Rain Showers | 5 to 9 mph N | 24% |
| Saturday | 70°F | Slight Chance Rain Showers | 9 mph N | 18% |
Forecast source: National Weather Service (api.weather.gov) for Lewisburg (40.964, -76.890). Updated through the day.
Growing snapshot for Lewisburg
Last spring frost
Apr 26
First fall frost
Oct 20
Growing season
176 days
Hardiness zone
6b
More local growing data for Lewisburg: nearby ZIP 17850 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Allenwood
Atlas
Dalmatia
Dewart
Edgewood
Fairview-Ferndale
Klingerstown
Kulpmont
Linntown
Locust Gap
Marion Heights
Marshallton
McEwensville
Montandon
Mount Carmel
Northumberland
Ranshaw
Riverside
Shamokin
Snydertown
Strong
Sunbury
Tharptown (Uniontown)
Trevorton
Turbotville
Watsontown
Climate data from the nearest NOAA station, Lewisburg, Pa (1.7 mi from Lewisburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.