| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°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: | 47f - Rolling Loess Prairies |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 50061 - Cumming, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 17 | 28 | 39 | 51 | 60 | 65 | 63 | 53 | 41 | 28 | 16 | 39 |
| Avg Max Temp (°F) | 29 | 35 | 48 | 61 | 72 | 81 | 86 | 83 | 76 | 64 | 47 | 33 | 60 |
| Avg Precip (In.) | .97 | 1.13 | 2.19 | 3.51 | 4.33 | 4.68 | 4.24 | 4.24 | 3.28 | 2.62 | 2.11 | 1.26 | 34.56 |