Riverside, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a borough in Northumberland County, Pennsylvania.
Tonight
50°F
Partly Cloudy then Patchy Fog
Patchy fog after 2am. Partly cloudy, with a low around 50. North wind 2 to 6 mph.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Partly Cloudy then Patchy Fog | 2 to 6 mph N | 0% |
| Saturday | 71°F | Patchy Fog then Mostly Sunny | 2 mph E | 2% |
| Saturday Night | 59°F | Mostly Cloudy then Rain Showers Likely | 1 to 9 mph SE | 74% |
| Sunday | 69°F | Rain Showers | 3 to 9 mph S | 97% |
| Sunday Night | 56°F | Showers And Thunderstorms | 6 mph NW | 97% |
| Monday | 66°F | Chance Rain Showers | 6 mph N | 28% |
| Monday Night | 53°F | Chance Rain Showers | 3 to 7 mph NE | 48% |
| Tuesday | 60°F | Chance Rain Showers | 7 mph E | 53% |
| Tuesday Night | 48°F | Chance Rain Showers | 8 mph NE | 53% |
| Wednesday | 59°F | Chance Rain Showers | 8 mph NE | 45% |
| Wednesday Night | 49°F | Chance Showers And Thunderstorms | 6 mph NE | 45% |
| Thursday | 61°F | Chance Showers And Thunderstorms | 6 mph NE | 37% |
| Thursday Night | 50°F | Chance Showers And Thunderstorms | 3 mph NE | 35% |
| Friday | 66°F | Slight Chance Rain Showers then Partly Sunny | 6 mph N | 22% |
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 Sep 19, 2026.