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Union County, PA Weather Forecast
Union County, PA Weather Forecast Date: 1031 PM EST Mon Mar 02 2026
The area/counties/county of: Union, including the city of Lewisburg.or toggle through each period.
Overnight... Partly cloudy late this evening, then becoming 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. Gusts up to 20 mph. Chance of precipitation 50%.
Tuesday... Snow, freezing rain, rain with a slight chance of sleet 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. South winds around 5 mph with gusts up to 20 mph. Chance of precipitation near 100%.
Tuesday Night... Rain in the evening. Not as cool with lows in the mid 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. Lows around 40. Light and variable winds. 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 in the morning, then becoming partly sunny. 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, mainly in the evening. Unseasonably mild. Lows in the upper 40s. Chance of rain 70%.
Sunday... Partly sunny. Warm with highs in the mid 60s.
Sunday Night... Partly cloudy. Unseasonably mild. Lows in the upper 40s.
POP = Probability of Precipitation
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