Plato, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 19.2 °C (high). Annual precipitation averages 1167.1 Millimeters. 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 | -5.4 °C | 5.8 °C | 69.34 mm |
| February | -3.3 °C | 8.6 °C | 71.12 mm |
| March | 1.1 °C | 13.9 °C | 104.14 mm |
| April | 6.6 °C | 19.7 °C | 125.73 mm |
| May | 12 °C | 24.1 °C | 140.46 mm |
| June | 17 °C | 28.4 °C | 103.89 mm |
| July | 19 °C | 30.9 °C | 102.87 mm |
| August | 18.1 °C | 30.7 °C | 92.46 mm |
| September | 13.3 °C | 26.5 °C | 100.58 mm |
| October | 7 °C | 20.6 °C | 86.11 mm |
| November | 1.5 °C | 13.6 °C | 99.06 mm |
| December | -3.2 °C | 7.6 °C | 71.37 mm |
| Annual | 7 °C | 19.2 °C | 1167.13 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |