Lewisburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewisburg, a borough in Northumberland County, Pennsylvania.
Today
74°F
Patchy Fog then Mostly Sunny
Patchy fog before 9am. Mostly sunny, with a high near 74. South wind 1 to 9 mph.
7-day forecast for Lewisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Patchy Fog then Mostly Sunny | 1 to 9 mph S | 1% |
| Tonight | 58°F | Mostly Cloudy then Light Rain | 5 to 8 mph S | 82% |
| Thursday | 73°F | Light Rain | 3 to 9 mph S | 89% |
| Thursday Night | 50°F | Chance Light Rain then Mostly Cloudy | 0 to 3 mph SW | 31% |
| Friday | 68°F | Slight Chance Light Rain | 1 mph NE | 15% |
| Friday Night | 44°F | Partly Cloudy | 1 mph NW | 13% |
| Saturday | 60°F | Chance Light Rain | 2 to 10 mph W | 25% |
| Saturday Night | 39°F | Chance Light Rain | 8 mph W | 25% |
| Sunday | 58°F | Mostly Sunny | 5 to 9 mph W | 5% |
| Sunday Night | 35°F | Partly Cloudy | 6 mph W | 6% |
| Monday | 58°F | Mostly Sunny | 5 to 12 mph W | 9% |
| Monday Night | 33°F | Partly Cloudy | 2 to 6 mph SW | 9% |
| Tuesday | 63°F | Mostly Sunny | 2 to 10 mph SW | 3% |
| Tuesday Night | 34°F | Partly Cloudy | 2 to 6 mph W | 0% |
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 Nov 4, 2026.