| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F 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 5a: -20F to -15F |
| 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: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 52333 - Solon, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 16 | 27 | 38 | 50 | 60 | 64 | 62 | 53 | 41 | 28 | 16 | 39 |
| Avg Max Temp (°F) | 28 | 34 | 47 | 61 | 73 | 82 | 85 | 83 | 75 | 64 | 46 | 32 | 59 |
| Avg Precip (In.) | 1.12 | 1.17 | 2.3 | 3.51 | 4.3 | 4.65 | 4.27 | 4.56 | 3.5 | 2.57 | 2.44 | 1.57 | 35.96 |