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Diamond, IL Weather Forecast
Diamond, IL Weather Forecast Date: 501 AM CDT Sat Oct 03 2026
The area/counties/county of: Grundy, including the cities of: Morris, Coal City, and Minooka.or toggle through each period.
Today... Mostly sunny. Patchy fog early in the morning. Highs in the lower 70s. Southeast winds 5 to 10 mph.
Tonight... Mostly clear. Lows in the upper 40s. Southeast winds around 5 mph, becoming south after midnight.
Sunday... Mostly sunny. Highs in the mid 70s. Northwest winds 5 to 10 mph.
Sunday Night... Mostly clear. Lows in the mid 40s. Northwest winds around 5 mph.
Monday... Sunny. Highs in the upper 60s. North winds around 5 mph.
Monday Night... Clear. Lows in the lower 40s.
Tuesday... Sunny. Highs in the lower 70s.
Tuesday Night... Clear. Lows around 50.
Wednesday... Mostly sunny. Highs in the mid 70s.
Wednesday Night... Mostly clear. Lows around 50.
Thursday... Mostly sunny. Highs in the upper 70s.
Thursday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 50s.
POP = Probability of Precipitation
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