Pella, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.1 °F (low) to 60.2 °F (high). Annual precipitation averages 37.4 Inches. Pella 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 | 13.4 °F | 30.6 °F | 1.04 in. |
| February | 17.1 °F | 35.2 °F | 1.36 in. |
| March | 27.8 °F | 48.2 °F | 2.09 in. |
| April | 39.1 °F | 61.4 °F | 4.11 in. |
| May | 51.3 °F | 71.6 °F | 5.0 in. |
| June | 61.5 °F | 81.3 °F | 5.33 in. |
| July | 65.0 °F | 85.2 °F | 4.32 in. |
| August | 62.5 °F | 83.2 °F | 4.42 in. |
| September | 53.7 °F | 76.9 °F | 3.62 in. |
| October | 41.6 °F | 64.2 °F | 2.66 in. |
| November | 29.6 °F | 48.4 °F | 1.98 in. |
| December | 19.1 °F | 35.8 °F | 1.5 in. |
| Annual | 40.1 °F | 60.2 °F | 37.43 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |