| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°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. 21 - Oct. 31 |
| 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 65591 - Montreal, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 26 | 35 | 44 | 54 | 63 | 68 | 66 | 58 | 46 | 36 | 26 | 45 |
| Avg Max Temp (°F) | 42 | 48 | 59 | 68 | 76 | 84 | 89 | 89 | 81 | 71 | 57 | 46 | 67 |
| Avg Precip (In.) | 1.86 | 2.23 | 3.68 | 4.16 | 5.02 | 4.1 | 3.8 | 3.65 | 4.11 | 3.91 | 4.05 | 2.81 | 43.38 |