| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 71b - Mitchell Plain |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 47401 - Bloomington, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 23 | 32 | 41 | 51 | 61 | 64 | 62 | 55 | 43 | 34 | 24 | 42 |
| Avg Max Temp (°F) | 37 | 42 | 53 | 64 | 74 | 82 | 86 | 85 | 78 | 67 | 53 | 42 | 64 |
| Avg Precip (In.) | 2.64 | 2.67 | 3.71 | 4.27 | 5.07 | 4.1 | 4.41 | 4.02 | 3.47 | 3.09 | 3.95 | 3.37 | 44.77 |