| 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 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 47a - Loess Prairies | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 51201 - Sheldon, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 11 | 22 | 34 | 47 | 57 | 61 | 59 | 49 | 36 | 22 | 9 | 34 |
| Avg Max Temp (°F) | 23 | 30 | 42 | 58 | 71 | 80 | 83 | 81 | 73 | 61 | 41 | 27 | 56 |
| Avg Precip (In.) | .76 | .64 | 2.07 | 2.88 | 3.56 | 4.34 | 3.76 | 3.94 | 2.58 | 2.05 | 1.59 | .81 | 28.99 |