Plato, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.6 °F (low) to 66.6 °F (high). Annual precipitation averages 46 Inches. Plato is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.3 °F | 42.4 °F | 2.73 in. |
| February | 26.1 °F | 47.5 °F | 2.8 in. |
| March | 33.9 °F | 57.0 °F | 4.1 in. |
| April | 43.9 °F | 67.5 °F | 4.95 in. |
| May | 53.6 °F | 75.4 °F | 5.53 in. |
| June | 62.6 °F | 83.1 °F | 4.09 in. |
| July | 66.2 °F | 87.6 °F | 4.05 in. |
| August | 64.6 °F | 87.2 °F | 3.64 in. |
| September | 56.0 °F | 79.7 °F | 3.96 in. |
| October | 44.6 °F | 69.0 °F | 3.39 in. |
| November | 34.7 °F | 56.5 °F | 3.9 in. |
| December | 26.3 °F | 45.7 °F | 2.81 in. |
| Annual | 44.6 °F | 66.6 °F | 45.95 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |