The USDA updated the Climatic Zone Charts for the United States last autumn. In Spencer, Iowa; Spirit Lake, Iowa and Stom Lake, Iowa we had been classified Zone 4A. A Zone 4 winter was one in which the low temperatures were between -20 and -30 without the windchill...
![What zone are we now?](https://delsgarden.com/wp-content/uploads/2024/04/2023-hardiness-zone-map-1080x675.jpg)
What zone are we now?
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