| 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: | 54c - Kankakee Marsh |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 46619 - South Bend, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 18 | 27 | 37 | 48 | 58 | 62 | 60 | 52 | 41 | 32 | 21 | 39 |
| Avg Max Temp (°F) | 30 | 35 | 46 | 58 | 70 | 80 | 83 | 81 | 74 | 62 | 48 | 35 | 59 |
| Avg Precip (In.) | 2.27 | 1.95 | 2.88 | 3.63 | 3.55 | 4.21 | 3.74 | 3.91 | 3.75 | 3.25 | 3.39 | 3.08 | 39.6 |