Riverside, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a borough in Northumberland County, Pennsylvania.
This Afternoon
67°F
Partly Sunny
Partly sunny, with a high near 67. South wind around 2 mph.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Partly Sunny | 2 mph S | 2% |
| Tonight | 49°F | Partly Cloudy | 3 mph SE | 2% |
| Wednesday | 72°F | Mostly Sunny | 2 to 7 mph S | 2% |
| Wednesday Night | 60°F | Mostly Cloudy then Rain Showers Likely | 9 mph S | 71% |
| Thursday | 70°F | Rain Showers | 5 to 9 mph S | 89% |
| Thursday Night | 55°F | Chance Rain Showers | 0 to 3 mph SW | 40% |
| Friday | 67°F | Chance Rain Showers | 1 mph NW | 43% |
| Friday Night | 46°F | Chance Rain Showers | 1 mph NW | 43% |
| Saturday | 60°F | Slight Chance Rain Showers | 2 to 7 mph NW | 19% |
| Saturday Night | 39°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph NW | 19% |
| Sunday | 58°F | Mostly Sunny | 2 to 6 mph W | 7% |
| Sunday Night | 36°F | Slight Chance Rain Showers | 5 mph W | 16% |
| Monday | 58°F | Chance Rain Showers | 5 to 10 mph NW | 25% |
| Monday Night | 35°F | Slight Chance Rain Showers | 7 mph W | 23% |
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 Nov 4, 2026.