Greentop, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 61.6 °F (high). Annual precipitation averages 40.3 Inches. Greentop is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.6 °F | 33.2 °F | 1.32 in. |
| February | 18.9 °F | 38.2 °F | 1.68 in. |
| March | 29.3 °F | 50.4 °F | 2.38 in. |
| April | 40.4 °F | 62.5 °F | 3.9 in. |
| May | 51.7 °F | 72.1 °F | 5.62 in. |
| June | 61.4 °F | 81.5 °F | 5.35 in. |
| July | 65.4 °F | 85.7 °F | 4.64 in. |
| August | 63.3 °F | 84.3 °F | 4.22 in. |
| September | 54.4 °F | 77.3 °F | 4.06 in. |
| October | 42.7 °F | 64.8 °F | 3.12 in. |
| November | 30.8 °F | 50.6 °F | 2.32 in. |
| December | 21.1 °F | 38.0 °F | 1.66 in. |
| Annual | 41.3 °F | 61.6 °F | 40.27 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |