| 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: | 56b - Elkhart Till Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 46540 - Middlebury, 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 | 59 | 71 | 80 | 83 | 81 | 74 | 62 | 48 | 35 | 59 |
| Avg Precip (In.) | 1.88 | 1.74 | 2.66 | 3.41 | 3.53 | 3.99 | 3.66 | 3.89 | 3.52 | 2.92 | 2.91 | 2.67 | 36.79 |