| 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: | 47b - Des Moines Lobe |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 50511 - Algona, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 11 | 23 | 34 | 47 | 57 | 61 | 58 | 48 | 36 | 23 | 9 | 34 |
| Avg Max Temp (°F) | 23 | 29 | 42 | 57 | 71 | 80 | 83 | 80 | 73 | 61 | 42 | 27 | 56 |
| Avg Precip (In.) | .74 | .72 | 1.86 | 3.12 | 3.79 | 4.82 | 4.16 | 3.84 | 2.86 | 2.26 | 1.81 | .89 | 30.86 |