| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 39f - St. Francois Knobs and Basins |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 63640 - Farmington, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 23 | 33 | 43 | 52 | 61 | 66 | 63 | 55 | 43 | 34 | 24 | 43 |
| Avg Max Temp (°F) | 39 | 46 | 56 | 67 | 75 | 84 | 88 | 87 | 80 | 69 | 55 | 44 | 66 |
| Avg Precip (In.) | 2.26 | 2.47 | 3.95 | 4.2 | 4.33 | 3.67 | 3.76 | 3.96 | 3.29 | 2.92 | 4.45 | 3.49 | 42.74 |