Clarence, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 17.5 °C (high). Annual precipitation averages 1058.2 Millimeters. Clarence 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.9 °C | 2.1 °C | 43.43 mm |
| February | -6 °C | 4.9 °C | 50.04 mm |
| March | -0.4 °C | 11.5 °C | 69.34 mm |
| April | 5.6 °C | 17.9 °C | 107.7 mm |
| May | 11.7 °C | 23.2 °C | 137.92 mm |
| June | 17.1 °C | 28.2 °C | 133.86 mm |
| July | 19.2 °C | 30.6 °C | 116.08 mm |
| August | 17.8 °C | 29.9 °C | 100.84 mm |
| September | 12.9 °C | 25.9 °C | 100.08 mm |
| October | 6.7 °C | 19.2 °C | 84.07 mm |
| November | 0.3 °C | 11.4 °C | 66.29 mm |
| December | -4.9 °C | 4.6 °C | 48.51 mm |
| Annual | 6 °C | 17.5 °C | 1058.16 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |