| 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: | 47c - Iowan Surface | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 50622 - Denver, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 12 | 24 | 36 | 48 | 57 | 62 | 59 | 50 | 38 | 25 | 12 | 36 |
| Avg Max Temp (°F) | 24 | 31 | 43 | 58 | 71 | 80 | 84 | 82 | 74 | 62 | 43 | 29 | 57 |
| Avg Precip (In.) | .93 | 1.01 | 2.12 | 3.45 | 4.24 | 4.82 | 4.34 | 4.45 | 3.14 | 2.53 | 2.2 | 1.21 | 34.44 |