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Northumberland County, PA Weather Forecast
Northumberland County, PA Weather Forecast Date: 1031 PM EST Mon Mar 02 2026
The area/counties/county of: Northumberland, including the cities of: Sunbury and Shamokin.or toggle through each period.
Overnight... Mostly cloudy. A chance of freezing rain and snow. Little or no snow accumulation. Additional ice accumulation around a trace. Lows in the mid 20s. South winds around 5 mph. Chance of precipitation 50%.
Tuesday... Snow with possible freezing rain, rain and sleet likely in the morning, then rain and freezing rain in the afternoon. Snow and sleet accumulation up to 1 inch. Ice accumulation of up to a tenth of an inch. Highs in the upper 30s. Southeast winds around 5 mph with gusts up to 20 mph. Chance of precipitation near 100%.
Tuesday Night... Rain, mainly in the evening. Not as cool. Near steady temperature in the upper 30s. South winds around 5 mph, becoming northwest after midnight. Chance of rain near 100%.
Wednesday... Mostly cloudy. Not as cool with highs in the lower 50s. North winds around 5 mph in the morning, becoming light and variable.
Wednesday Night... Cloudy. A chance of rain in the evening, then rain likely after midnight. Mild. Lows in the lower 40s. Light and variable winds, becoming southeast around 5 mph after midnight. Chance of rain 70%.
Thursday... Rain likely. Highs in the lower 50s. Chance of rain 70%.
Thursday Night... Rain. Unseasonably mild. Lows in the mid 40s. Chance of rain 90%.
Friday... Mostly cloudy. Highs around 60.
Friday Night... Mostly cloudy. Mild. Lows in the mid 40s.
Saturday... Mostly cloudy in the morning, then partly sunny with a chance of showers in the afternoon. Warm with highs in the mid 60s. Chance of rain 50%.
Saturday Night... Showers likely in the evening. Unseasonably mild. Lows around 50. Chance of rain 60%.
Sunday... Mostly cloudy in the morning, then becoming mostly sunny. Warm with highs in the mid 60s.
Sunday Night... Partly cloudy. Unseasonably mild. Lows in the upper 40s.
POP = Probability of Precipitation
Northumberland County Radar Loop
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