| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°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: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 51250 - Sioux Center, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 13 | 24 | 35 | 48 | 57 | 61 | 59 | 49 | 37 | 23 | 11 | 35 |
| Avg Max Temp (°F) | 26 | 33 | 46 | 61 | 74 | 83 | 86 | 83 | 76 | 64 | 43 | 30 | 59 |
| Avg Precip (In.) | .72 | .65 | 2 | 2.8 | 3.53 | 4.48 | 3.72 | 3.47 | 2.61 | 2.09 | 1.56 | .78 | 28.41 |