| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47c - Iowan Surface |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 50475 - Sheffield, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 12 | 24 | 35 | 48 | 58 | 62 | 59 | 50 | 38 | 24 | 11 | 35 |
| Avg Max Temp (°F) | 23 | 30 | 43 | 57 | 71 | 80 | 83 | 81 | 74 | 61 | 43 | 28 | 56 |
| Avg Precip (In.) | .9 | .85 | 2.02 | 3.27 | 4.22 | 5.03 | 4.47 | 4.33 | 3.25 | 2.48 | 2.01 | 1.12 | 33.94 |