🌷 Your Ultimate Garden Calendar!

Weather Almanac: Manhattan, IL 60442

🗓️ Historical norms for August

July September
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
August avg. precipitation
🌧️ 3.82"
August days below freezing
📉 ≈0.0 days
Average August lows 60°F – 66°F
USDA Zone
6a
Annual extreme lows -10°F to -5°F
Last Spring Frost (36°F)
🌷 May 8
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First Fall Frost (36°F)
🍂 Oct 6
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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

F: Forecast
H: Normal High Temp
L: Normal Low Temp
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: JOLIET BRANDON RD DAM (USC00114530)

Precipitation climatic data from weather station: MANHATTAN 4 SW (USC00115313)

Agricultural climatic data from weather station: JOLIET BRANDON RD DAM (USC00114530)