| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55d - Pre-Wisconsinan Drift Plains |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 47274 - Seymour, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 23 | 31 | 41 | 51 | 60 | 64 | 62 | 53 | 41 | 33 | 25 | 42 |
| Avg Max Temp (°F) | 38 | 43 | 54 | 65 | 75 | 82 | 86 | 85 | 79 | 68 | 54 | 42 | 64 |
| Avg Precip (In.) | 3.12 | 2.79 | 3.8 | 4.52 | 4.93 | 4.12 | 4.41 | 4.15 | 3.01 | 3.22 | 3.98 | 3.37 | 45.4 |