Creston, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.7 °F (low) to 60 °F (high). Annual precipitation averages 35.5 Inches. Creston is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.1 °F | 30.8 °F | 0.86 in. |
| February | 17.1 °F | 36.0 °F | 1.24 in. |
| March | 27.4 °F | 48.6 °F | 2.01 in. |
| April | 38.6 °F | 61.3 °F | 3.47 in. |
| May | 50.5 °F | 71.2 °F | 5.15 in. |
| June | 60.7 °F | 80.5 °F | 4.98 in. |
| July | 64.5 °F | 84.5 °F | 3.98 in. |
| August | 62.4 °F | 83.3 °F | 4.18 in. |
| September | 53.3 °F | 75.9 °F | 3.82 in. |
| October | 41.0 °F | 63.6 °F | 2.61 in. |
| November | 29.0 °F | 48.5 °F | 1.94 in. |
| December | 18.4 °F | 35.7 °F | 1.26 in. |
| Annual | 39.7 °F | 60 °F | 35.5 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |