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Borough of Northumberland, PANorthumberland, PA 7-Day Night Weather Forecast
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Northumberland, PA Weather Forecast
Northumberland, PA Weather Forecast Date: 430 AM EDT Thu Aug 06 2026
The area/counties/county of: Northumberland, including the cities of: Sunbury and Shamokin.or toggle through each period.
Today... Partly sunny. Patchy fog this morning. Showers and thunderstorms likely this afternoon. Some thunderstorms May produce gusty winds and heavy rainfall this afternoon. Very warm with highs in the upper 80s. Southwest winds around 5 mph. Chance of rain 70%.
Tonight... Mostly cloudy with showers likely with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Patchy fog. Some thunderstorms May produce gusty winds and heavy rainfall in the evening. Warm with lows around 70. South winds around 5 mph in the evening, becoming light and variable. Chance of rain 70%.
Friday... Partly sunny. Patchy fog in the morning. A chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Light and variable winds, becoming southwest around 5 mph in the afternoon. Chance of rain 50%.
Friday Night... A chance of thunderstorms in the evening. Showers likely. Humid with lows in the upper 60s. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 70%.
Saturday... Partly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Southwest winds around 5 mph. Chance of rain 40%.
Saturday Night... Partly cloudy. A chance of showers and thunderstorms in the evening. Humid with lows in the upper 60s. Chance of rain 40%.
Sunday... Sunny with highs in the mid 80s.
Sunday Night... Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the upper 60s.
Monday... Mostly sunny. Humid with highs in the mid 80s.
Monday Night... Mostly cloudy with a chance of showers and thunderstorms. Humid with lows in the upper 60s. Chance of rain 40%.
Tuesday... Partly sunny. A chance of showers in the afternoon. Humid with highs in the mid 80s. Chance of rain 50%.
Tuesday Night... Mostly cloudy with a chance of showers. Humid with lows in the mid 60s. Chance of rain 50%.
POP = Probability of Precipitation
Northumberland Radar Loop
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