Holts Summit, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 18.5 °C (high). Annual precipitation averages 1108.5 Millimeters. Holts Summit 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 | -6.2 °C | 4 °C | 56.9 mm |
| February | -4.2 °C | 6.8 °C | 56.13 mm |
| March | 0.7 °C | 12.8 °C | 81.28 mm |
| April | 6.4 °C | 18.8 °C | 122.94 mm |
| May | 12.3 °C | 23.8 °C | 127 mm |
| June | 17.5 °C | 28.6 °C | 111.25 mm |
| July | 19.7 °C | 31 °C | 113.79 mm |
| August | 18.6 °C | 30.6 °C | 97.54 mm |
| September | 13.8 °C | 26.4 °C | 109.22 mm |
| October | 7.4 °C | 20 °C | 90.17 mm |
| November | 1.4 °C | 12.6 °C | 80.77 mm |
| December | -3.7 °C | 6.2 °C | 61.47 mm |
| Annual | 7 °C | 18.5 °C | 1108.46 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 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 |