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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: 730 PM EDT Mon Aug 03 2026
The area/counties/county of: Northumberland, including the cities of: Sunbury and Shamokin.or toggle through each period.
Tonight... Mostly clear. Patchy fog after midnight. Cooler with lows in the upper 50s. North winds 5 to 10 mph this evening, becoming light and variable.
Tuesday... Areas of fog in the morning. Sunny. Highs in the lower 80s. Light and variable winds.
Tuesday Night... Mostly cloudy. Lows in the lower 60s. Light and variable winds.
Wednesday... Patchy fog in the morning. Mostly cloudy in the morning, then partly sunny with a chance of showers in the afternoon. Humid with highs in the lower 80s. Light and variable winds, becoming southeast around 5 mph in the afternoon. Chance of rain 30%.
Wednesday Night... Mostly cloudy with a chance of showers. Patchy fog after midnight. Humid with lows in the upper 60s. Southeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 40%.
Thursday... Patchy fog in the morning. Partly sunny in the morning, then mostly cloudy with showers with a chance of thunderstorms in the afternoon. Humid with highs in the mid 80s. Chance of rain 80%.
Thursday Night... Mostly cloudy in the evening, then becoming partly cloudy. Showers in the evening. A chance of thunderstorms. Humid with lows in the upper 60s. Chance of rain 80%.
Friday... Partly sunny. Showers likely with a chance of thunderstorms in the afternoon. Humid with highs in the mid 80s. Chance of rain 70%.
Friday Night... Mostly cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Humid with lows in the upper 60s. Chance of rain 70%.
Saturday... Partly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. Chance of rain 50%.
Saturday Night... Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Humid with lows in the upper 60s. Chance of rain 50%.
Sunday... Mostly sunny. Humid with highs in the mid 80s.
Sunday Night... Partly cloudy. Humid with lows in the upper 60s.
POP = Probability of Precipitation
Northumberland Radar Loop
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