| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 52b - Paleozoic Plateau/Coulee Section |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 52043 - Elkader, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 12 | 24 | 35 | 46 | 56 | 60 | 58 | 49 | 38 | 26 | 13 | 35 |
| Avg Max Temp (°F) | 27 | 33 | 46 | 60 | 72 | 81 | 84 | 82 | 75 | 63 | 45 | 31 | 58 |
| Avg Precip (In.) | 1.06 | 1.18 | 2.06 | 3.53 | 3.99 | 4.46 | 4.11 | 4.64 | 3.15 | 2.39 | 2.38 | 1.28 | 34.23 |