| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| 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: | 47e - Steeply Rolling Loess Prairies | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 51455 - Manning, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 14 | 24 | 36 | 48 | 58 | 63 | 61 | 51 | 39 | 25 | 13 | 37 |
| Avg Max Temp (°F) | 27 | 33 | 46 | 60 | 72 | 81 | 85 | 83 | 75 | 63 | 44 | 31 | 58 |
| Avg Precip (In.) | .84 | .86 | 2.22 | 3.29 | 4.27 | 4.49 | 4.21 | 3.71 | 3.46 | 2.48 | 1.76 | 1.03 | 32.62 |