| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| 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: | 39d - Central Plateau |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65560 - Salem, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 28 | 36 | 45 | 54 | 62 | 67 | 65 | 57 | 47 | 37 | 27 | 46 |
| Avg Max Temp (°F) | 42 | 48 | 59 | 69 | 77 | 84 | 89 | 88 | 81 | 71 | 57 | 46 | 68 |
| Avg Precip (In.) | 2.21 | 2.39 | 4 | 4.38 | 4.56 | 3.71 | 3.62 | 4.08 | 3.81 | 3.45 | 4.4 | 3.37 | 43.99 |