Pendleton, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.8 °C (low) to 18.3 °C (high). Annual precipitation averages 1104.7 Millimeters. Pendleton 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 3.7 °C | 62.23 mm |
| February | -4.6 °C | 6.7 °C | 61.98 mm |
| March | 0.3 °C | 12.3 °C | 79.5 mm |
| April | 6.4 °C | 19.3 °C | 118.62 mm |
| May | 12.1 °C | 23.9 °C | 130.81 mm |
| June | 17.3 °C | 28.4 °C | 120.14 mm |
| July | 19.3 °C | 30.7 °C | 109.98 mm |
| August | 18.3 °C | 30.1 °C | 97.03 mm |
| September | 13.7 °C | 26.3 °C | 88.39 mm |
| October | 7.6 °C | 19.9 °C | 86.87 mm |
| November | 1.2 °C | 12.4 °C | 84.58 mm |
| December | -3.7 °C | 5.8 °C | 64.52 mm |
| Annual | 6.8 °C | 18.3 °C | 1104.65 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |