Riverside, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a borough in Northumberland County, Pennsylvania.
Today
83°F
Areas Of Fog then Sunny
Areas of fog before 10am. Sunny, with a high near 83. North wind around 1 mph.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Areas Of Fog then Sunny | 1 mph N | 0% |
| Tonight | 64°F | Mostly Cloudy | 1 mph E | 2% |
| Wednesday | 81°F | Partly Sunny then Chance Showers And Thunderstorms | 3 mph SE | 38% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 mph SE | 55% |
| Thursday | 85°F | Slight Chance Showers And Thunderstorms | 5 mph S | 81% |
| Thursday Night | 69°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 mph S | 81% |
| Friday | 85°F | Showers And Thunderstorms Likely | 0 to 3 mph SW | 72% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 2 mph SW | 72% |
| Saturday | 83°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 48% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 2 mph SW | 48% |
| Sunday | 85°F | Mostly Sunny | 0 to 3 mph W | 12% |
| Sunday Night | 69°F | Mostly Clear | 3 mph SW | 12% |
| Monday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph W | 26% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 1 to 6 mph W | 26% |
Forecast source: National Weather Service (api.weather.gov) for Riverside (40.949, -76.642). Updated through the day.
Growing snapshot for Riverside
Last spring frost
Apr 30
First fall frost
Oct 13
Growing season
166 days
Hardiness zone
6b
More local growing data for Riverside: nearby ZIP 17868 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Allenwood
Atlas
Dalmatia
Dewart
Edgewood
Fairview-Ferndale
Klingerstown
Kulpmont
Lewisburg
Linntown
Locust Gap
Marion Heights
Marshallton
McEwensville
Montandon
Mount Carmel
Northumberland
Ranshaw
Shamokin
Snydertown
Strong
Sunbury
Tharptown (Uniontown)
Trevorton
Turbotville
Watsontown
Climate data from the nearest NOAA station, Sunbury, Pa (10.9 mi from Riverside). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.