Bellevue, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.5 °F (low) to 58.6 °F (high). Annual precipitation averages 37.6 Inches. Bellevue is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.8 °F | 28.7 °F | 1.33 in. |
| February | 15.0 °F | 33.1 °F | 1.56 in. |
| March | 26.3 °F | 45.8 °F | 2.11 in. |
| April | 37.3 °F | 59.2 °F | 3.75 in. |
| May | 48.8 °F | 71.0 °F | 4.26 in. |
| June | 59.1 °F | 80.7 °F | 5.49 in. |
| July | 62.8 °F | 83.9 °F | 4.48 in. |
| August | 60.6 °F | 82.0 °F | 3.96 in. |
| September | 52.1 °F | 75.5 °F | 3.6 in. |
| October | 40.4 °F | 62.4 °F | 3.0 in. |
| November | 28.9 °F | 47.0 °F | 2.28 in. |
| December | 18.4 °F | 34.2 °F | 1.78 in. |
| Annual | 38.5 °F | 58.6 °F | 37.6 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |