| 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. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47a - Loess Prairies |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 50588 - Storm Lake, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 12 | 23 | 35 | 48 | 57 | 62 | 59 | 50 | 38 | 24 | 11 | 35 |
| Avg Max Temp (°F) | 25 | 31 | 43 | 58 | 71 | 80 | 83 | 81 | 74 | 61 | 43 | 29 | 56 |
| Avg Precip (In.) | .62 | .61 | 2.02 | 3.49 | 4.09 | 5.01 | 4.44 | 4.54 | 3.42 | 2.4 | 1.64 | .74 | 33 |