| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| 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: | 56a - Lake Country |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 46787 - South Whitley, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 18 | 28 | 38 | 49 | 58 | 62 | 60 | 52 | 41 | 32 | 21 | 39 |
| Avg Max Temp (°F) | 31 | 35 | 47 | 59 | 71 | 80 | 83 | 81 | 75 | 63 | 48 | 36 | 59 |
| Avg Precip (In.) | 2.03 | 1.78 | 2.71 | 3.53 | 3.79 | 4.3 | 3.85 | 3.69 | 3.3 | 2.8 | 3.21 | 2.79 | 37.79 |