| 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 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 40a - Loess Flats and Till Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 64671 - Polo, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 28 | 39 | 50 | 59 | 64 | 61 | 52 | 40 | 29 | 18 | 39 |
| Avg Max Temp (°F) | 34 | 41 | 53 | 64 | 74 | 83 | 88 | 86 | 78 | 67 | 51 | 38 | 63 |
| Avg Precip (In.) | 1.4 | 1.41 | 2.76 | 3.84 | 5.11 | 4.57 | 4.27 | 3.54 | 4.27 | 3.16 | 2.77 | 1.89 | 38.97 |