| 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 Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47f - Rolling Loess Prairies |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 64504 - Saint Joseph, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 21 | 31 | 42 | 53 | 63 | 67 | 64 | 55 | 43 | 31 | 20 | 42 |
| Avg Max Temp (°F) | 36 | 42 | 54 | 65 | 75 | 85 | 89 | 87 | 80 | 69 | 52 | 39 | 65 |
| Avg Precip (In.) | .94 | 1.14 | 2.45 | 3.25 | 5.03 | 4.39 | 4.22 | 3.86 | 4.18 | 3.12 | 2.24 | 1.42 | 36.26 |