| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | 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: | 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 51249 - Sibley, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 9 | 21 | 32 | 45 | 56 | 60 | 58 | 47 | 35 | 21 | 8 | 33 |
| Avg Max Temp (°F) | 22 | 29 | 41 | 57 | 70 | 79 | 83 | 80 | 72 | 60 | 40 | 26 | 55 |
| Avg Precip (In.) | .59 | .56 | 1.97 | 2.87 | 3.45 | 4.35 | 3.43 | 4.21 | 2.83 | 1.96 | 1.45 | .69 | 28.37 |