Hornick, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.6 °F (low) to 60.6 °F (high). Annual precipitation averages 31 Inches. Hornick 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 | 10.6 °F | 30.1 °F | 0.66 in. |
| February | 14.7 °F | 35.0 °F | 0.85 in. |
| March | 25.6 °F | 48.4 °F | 1.58 in. |
| April | 36.4 °F | 62.0 °F | 3.14 in. |
| May | 48.8 °F | 72.9 °F | 4.5 in. |
| June | 59.6 °F | 82.8 °F | 4.75 in. |
| July | 63.4 °F | 86.0 °F | 3.68 in. |
| August | 60.8 °F | 83.8 °F | 4.28 in. |
| September | 51.6 °F | 77.8 °F | 2.9 in. |
| October | 38.5 °F | 64.9 °F | 2.18 in. |
| November | 25.7 °F | 48.3 °F | 1.46 in. |
| December | 15.5 °F | 34.7 °F | 1.05 in. |
| Annual | 37.6 °F | 60.6 °F | 31.03 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 |