Weather Almanac: Saint Charles, IL 60174

🌱 Growing Season

USDA Zone

5b

Annual extreme lows -15°F to -10°F

Last Spring Frost (36°F)

🌷 May 16

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First Fall Frost (36°F)

🍂 Sep 30

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📚 Book Recommendations (ads!)

📚 Illinois, Indiana & Ohio Month-by-Month Gardening: What to Do Each Month to Have a Beautiful Garden All Year

📚 Grow Great Vegetables Illinois

📚 Midwest Gardener's Handbook, 2nd Edition: All You Need to Know to Plan, Plant & Maintain a Midwest Garden

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Temperature climatic data from weather station: WEST CHICAGO DUPAGE AP (USW00094892)

Precipitation climatic data from weather station: WEST CHICAGO DUPAGE AP (USW00094892)

Agricultural climatic data from weather station: WEST CHICAGO DUPAGE AP (USW00094892)