Pierpont, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 18.4 °C (high). Annual precipitation averages 1093.2 Millimeters. Pierpont 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 | -6.4 °C | 3.6 °C | 57.91 mm |
| February | -4.3 °C | 6.4 °C | 56.39 mm |
| March | 0.9 °C | 12.6 °C | 78.23 mm |
| April | 6.6 °C | 18.9 °C | 124.46 mm |
| May | 12.6 °C | 23.9 °C | 124.71 mm |
| June | 17.7 °C | 28.8 °C | 115.82 mm |
| July | 19.9 °C | 31.2 °C | 112.52 mm |
| August | 18.6 °C | 30.7 °C | 95 mm |
| September | 13.9 °C | 26.7 °C | 105.16 mm |
| October | 7.3 °C | 19.9 °C | 89.41 mm |
| November | 1.4 °C | 12.6 °C | 74.93 mm |
| December | -3.7 °C | 6 °C | 58.67 mm |
| Annual | 7 °C | 18.4 °C | 1093.21 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |