| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| 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 | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 64468 - Maryville, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 28 | 39 | 50 | 59 | 64 | 61 | 52 | 40 | 28 | 17 | 39 |
| Avg Max Temp (°F) | 32 | 39 | 51 | 63 | 74 | 83 | 87 | 86 | 78 | 66 | 49 | 36 | 62 |
| Avg Precip (In.) | .88 | 1.01 | 2.37 | 3.2 | 4.59 | 4.19 | 5.04 | 3.87 | 4.04 | 2.95 | 2.31 | 1.28 | 35.72 |