Weather World
Lake Wilheim, PA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Lake Wilheim, PA Weather Forecast
Lake Wilheim, PA Weather Forecast Date: 1228 AM EDT Sun Aug 30 2026
The area/counties/county of: Mercer, including the cities of: Sharon, Hermitage, and Grove City.or toggle through each period.
Overnight... Mostly cloudy. Near steady temperature in the lower 60s. Southeast winds around 5 mph.
Today... Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 80s. South winds around 5 mph, becoming west in the afternoon.
Tonight... Considerable cloudiness with isolated thunderstorms. Scattered showers, mainly in the evening. Humid with lows in the mid 60s. Northeast winds around 5 mph, becoming southeast after midnight. Chance of rain 40%.
Monday... Mostly cloudy in the morning, then becoming partly sunny. Isolated showers. Isolated thunderstorms in the afternoon. Humid with highs in the upper 80s. South winds around 5 mph, becoming west in the afternoon. Chance of rain 20%.
Monday Night... Mostly cloudy. Humid with lows in the lower 70s. South winds around 5 mph.
Tuesday... Partly sunny. Highs in the upper 80s. Heat index values in the mid 90s in the afternoon.
Tuesday Night... Mostly cloudy. Scattered showers after midnight. Lows in the lower 70s. Chance of rain 40%.
Wednesday... Partly sunny with scattered showers in the morning, then partly cloudy in the afternoon. Highs around 90. Chance of rain 40%. Heat index values in the upper 90s in the afternoon.
Wednesday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows around 70. Chance of rain 60%.
Thursday... Partly sunny with a chance of thunderstorms. Showers likely, mainly in the morning. Highs in the mid 80s. Chance of rain 60%.
Thursday Night... A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 50%.
Friday... Partly sunny. A chance of showers in the morning. Highs in the lower 80s. Chance of rain 40%.
Friday Night... Partly cloudy. Lows in the lower 60s.
POP = Probability of Precipitation
Lake Wilheim Radar Loop
Use the map search tool if you want to place a location marker on the radar map...