| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°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 11 - May 20 | |
| 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 52057 - Manchester, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 13 | 24 | 35 | 47 | 57 | 61 | 59 | 49 | 38 | 26 | 14 | 36 |
| Avg Max Temp (°F) | 25 | 31 | 43 | 58 | 70 | 79 | 83 | 81 | 73 | 62 | 45 | 31 | 57 |
| Avg Precip (In.) | .96 | .98 | 1.96 | 3.35 | 3.95 | 4.57 | 4.32 | 4.91 | 3.35 | 2.59 | 2.3 | 1.25 | 34.48 |