🌷 Your Ultimate Garden Calendar!

Weather Almanac: Ottosen, IA 50570

🗓️ Historical norms for September

August October
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
September avg. precipitation
🌧️ 2.95"
September days below freezing
📉 ≈0.8 days
Average September lows 47°F – 52°F
USDA Zone
5a
Annual extreme lows -20°F to -15°F
Last Spring Frost (36°F)
🌷 May 14
View full details
First Fall Frost (36°F)
🍂 Sep 20
View full details

Book Recommendations (ads!)

📚 Prairie & Plains States Month-by-Month Gardening: What to Do Each Month to Have a Beautiful Garden All Year

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

📚 The Timber Press Guide to Vegetable Gardening in the Midwest

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: ALGONA 3 W (USC00130133)

Precipitation climatic data from weather station: ALGONA 3 W (USC00130133)

Agricultural climatic data from weather station: ALGONA 3 W (USC00130133)