Pleasant Hill, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.3 °F (low) to 60.4 °F (high). Annual precipitation averages 35.2 Inches. Pleasant Hill is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.1 °F | 30.6 °F | 0.96 in. |
| February | 17.0 °F | 35.2 °F | 1.2 in. |
| March | 28.0 °F | 48.2 °F | 2.08 in. |
| April | 39.3 °F | 61.8 °F | 3.68 in. |
| May | 51.4 °F | 72.1 °F | 4.91 in. |
| June | 61.7 °F | 81.8 °F | 5.21 in. |
| July | 65.5 °F | 85.6 °F | 4.2 in. |
| August | 62.9 °F | 83.9 °F | 4.05 in. |
| September | 54.2 °F | 77.4 °F | 3.32 in. |
| October | 41.8 °F | 64.0 °F | 2.56 in. |
| November | 29.6 °F | 48.8 °F | 1.76 in. |
| December | 18.9 °F | 35.8 °F | 1.3 in. |
| Annual | 40.3 °F | 60.4 °F | 35.23 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |