Lewisburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewisburg, a borough in Northumberland County, Pennsylvania.
Today
84°F
Sunny
Sunny, with a high near 84. East wind around 1 mph.
7-day forecast for Lewisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 1 mph E | 0% |
| Tonight | 63°F | Partly Cloudy then Patchy Fog | 1 mph NE | 2% |
| Wednesday | 82°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 3 mph SE | 15% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms then Patchy Fog | 0 to 3 mph E | 53% |
| Thursday | 87°F | Patchy Fog then Showers And Thunderstorms | 0 to 6 mph W | 81% |
| Thursday Night | 71°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 3 mph W | 81% |
| Friday | 86°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 73% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 2 mph SW | 73% |
| Saturday | 85°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph W | 45% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 0 to 3 mph W | 45% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph W | 11% |
| Sunday Night | 69°F | Partly Cloudy | 0 to 3 mph SW | 11% |
| Monday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 8 mph W | 24% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 1 to 7 mph W | 24% |
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
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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 Aug 4, 2026.