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Arnold, IL Weather Forecast
Arnold, IL Weather Forecast Date: 637 AM CDT Fri Oct 23 2026
The area/counties/county of: Morgan, including the city of Jacksonville.or toggle through each period.
Today... Sunny. Highs in the mid 70s. Southeast winds around 5 mph.
Tonight... Mostly clear. Lows in the upper 40s. Southeast winds around 5 mph.
Saturday... Mostly sunny. Highs in the mid 70s. Southeast winds around 5 mph.
Saturday Night... Partly cloudy. Lows in the upper 40s. Southeast winds around 5 mph.
Sunday... Mostly sunny. Highs in the upper 70s. South winds around 5 mph.
Sunday Night... Mostly cloudy. Lows around 50. Highs in the mid 70s.
Monday... Mostly cloudy. Lows around 50. Highs in the mid 70s.
Tuesday... Mostly cloudy. Lows around 50. Highs in the mid 70s.
Wednesday... Mostly sunny. Highs in the mid 70s.
Wednesday Night... Mostly clear in the evening, then becoming partly cloudy. Lows around 50.
POP = Probability of Precipitation
Arnold Radar Loop
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