State Center, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.9 °F (low) to 57.8 °F (high). Annual precipitation averages 36.8 Inches. State Center is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.1 °F | 27.4 °F | 0.97 in. |
| February | 14.2 °F | 32.1 °F | 1.13 in. |
| March | 25.6 °F | 45.2 °F | 2.06 in. |
| April | 36.7 °F | 59.2 °F | 3.75 in. |
| May | 49.4 °F | 70.1 °F | 5.07 in. |
| June | 59.9 °F | 79.8 °F | 5.57 in. |
| July | 63.4 °F | 83.1 °F | 4.41 in. |
| August | 60.7 °F | 81.0 °F | 4.38 in. |
| September | 51.7 °F | 75.2 °F | 3.5 in. |
| October | 39.4 °F | 61.6 °F | 2.59 in. |
| November | 27.0 °F | 46.3 °F | 1.91 in. |
| December | 16.3 °F | 33.1 °F | 1.44 in. |
| Annual | 37.9 °F | 57.8 °F | 36.78 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |