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Weather Almanac: Prophetstown, IL 61277

🗓️ Historical norms for May

April June
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
May avg. precipitation
🌧️ 4.02"
May days below freezing
📉 ≈0.5 days
Average May lows 46°F – 52°F
USDA Zone
5b
Annual extreme lows -15°F to -10°F
Last Spring Frost (36°F)
🌷 May 11
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First Fall Frost (36°F)
🍂 Sep 27
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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: MORRISON (USC00115833)

Precipitation climatic data from weather station: PROPHETSTOWN (USC00117014)

Agricultural climatic data from weather station: MORRISON (USC00115833)