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Greenbrier, PA Weather Forecast
Greenbrier, PA Weather Forecast Date: 300 AM EDT Tue Oct 27 2026
The area/counties/county of: Northumberland, including the cities of: Sunbury and Shamokin.or toggle through each period.
Rest of Tonight... Partly cloudy. Lows in the lower 40s. North winds around 5 mph.
Tuesday... Sunny. Highs in the lower 60s. North winds around 5 mph.
Tuesday Night... Partly cloudy. Lows in the upper 30s. Light and variable winds.
Wednesday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 60s. South winds around 5 mph.
Wednesday Night... Partly cloudy. Patchy fog after midnight. Lows in the lower 40s. Southeast winds around 5 mph in the evening, becoming light and variable.
Thursday... Patchy fog in the morning. Sunny. Highs in the upper 60s.
Thursday Night... Mostly clear. Lows in the upper 40s.
Friday... Mostly sunny. Highs around 70.
Friday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s.
Saturday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 60s.
Saturday Night... Mostly cloudy. Lows in the mid 40s.
Sunday... Mostly cloudy. A chance of showers in the afternoon. Highs in the mid 60s. Chance of rain 30%.
Sunday Night... Mostly cloudy with a 50% chance of showers. Lows in the lower 50s.
POP = Probability of Precipitation
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