| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 39a - Springfield Plateau |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65619 - Brookline, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 25 | 34 | 43 | 53 | 62 | 67 | 65 | 57 | 45 | 34 | 25 | 44 |
| Avg Max Temp (°F) | 41 | 48 | 57 | 67 | 75 | 84 | 89 | 89 | 81 | 70 | 56 | 45 | 67 |
| Avg Precip (In.) | 2.05 | 2.24 | 3.86 | 4.28 | 4.61 | 4.93 | 3.57 | 3.34 | 4.74 | 3.53 | 4.47 | 3.17 | 44.79 |