| 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. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 40a - Loess Flats and Till Plains |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 64628 - Brookfield, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 20 | 30 | 40 | 52 | 61 | 66 | 64 | 55 | 43 | 31 | 20 | 41 |
| Avg Max Temp (°F) | 33 | 41 | 53 | 64 | 74 | 83 | 87 | 86 | 78 | 67 | 51 | 38 | 63 |
| Avg Precip (In.) | 1.51 | 1.47 | 2.71 | 3.63 | 4.81 | 4.13 | 4.59 | 3.99 | 4.38 | 3.33 | 2.91 | 2.02 | 39.48 |