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Altamont, IL Weather Forecast
Altamont, IL Weather Forecast Date: 337 PM CDT Sat Sep 26 2026
The area/counties/county of: Effingham, including the city of Effingham.or toggle through each period.
Tonight... Mostly cloudy this evening, then becoming partly cloudy. Lows in the lower 50s. East winds around 5 mph.
Sunday... Mostly sunny. Highs in the mid 70s. Northeast winds around 5 mph.
Sunday Night... Mostly clear. Lows in the upper 40s. Northeast winds around 5 mph.
Monday... Sunny. Highs in the mid 70s. Northeast winds around 5 mph in the morning, becoming light and variable.
Monday Night... Mostly clear. Lows in the mid 50s. Light and variable winds.
Tuesday... Sunny. Highs in the upper 70s.
Tuesday Night... Mostly cloudy. Lows in the lower 60s.
Wednesday... Mostly cloudy with a chance of showers. Highs in the upper 70s. Lows in the mid 60s. Chance of rain 50%.
Wednesday Night... Mostly cloudy with a chance of showers. Highs in the upper 70s. Lows in the mid 60s. Chance of rain 50%.
Thursday... Mostly cloudy. A chance of showers in the morning, then showers likely in the afternoon. Highs in the upper 70s. Chance of rain 60%.
Thursday Night... Mostly cloudy. A chance of showers. Lows in the lower 60s. Chance of rain 50%.
Friday... Mostly cloudy. A 50% chance of showers. Highs in the lower 70s. Lows in the upper 50s.
Friday Night... Mostly cloudy. A 50% chance of showers. Highs in the lower 70s. Lows in the upper 50s.
POP = Probability of Precipitation
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