Pleasant Hill, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 18.4 °C (high). Annual precipitation averages 1144 Millimeters. Pleasant Hill 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 | -6.8 °C | 3.8 °C | 37.85 mm |
| February | -4.7 °C | 6.6 °C | 48.51 mm |
| March | 0.6 °C | 12.6 °C | 77.22 mm |
| April | 6.3 °C | 18.6 °C | 117.09 mm |
| May | 12.3 °C | 23.7 °C | 149.61 mm |
| June | 17.6 °C | 28.7 °C | 150.11 mm |
| July | 19.9 °C | 31.3 °C | 122.68 mm |
| August | 18.8 °C | 30.6 °C | 115.57 mm |
| September | 14.1 °C | 26.4 °C | 116.59 mm |
| October | 7.2 °C | 19.9 °C | 94.74 mm |
| November | 1.1 °C | 12.4 °C | 65.53 mm |
| December | -4.2 °C | 6.1 °C | 48.51 mm |
| Annual | 6.9 °C | 18.4 °C | 1144.01 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 |