Little Rock, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.1 °F (low) to 55.9 °F (high). Annual precipitation averages 30.1 Inches. Little Rock 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.5 °F | 24.4 °F | 0.73 in. |
| February | 10.7 °F | 28.9 °F | 0.85 in. |
| March | 22.1 °F | 41.6 °F | 1.58 in. |
| April | 33.9 °F | 56.9 °F | 3.11 in. |
| May | 46.8 °F | 69.3 °F | 4.03 in. |
| June | 58.1 °F | 79.5 °F | 4.79 in. |
| July | 61.5 °F | 83.0 °F | 3.48 in. |
| August | 58.9 °F | 80.6 °F | 3.4 in. |
| September | 49.9 °F | 74.1 °F | 3.28 in. |
| October | 36.9 °F | 60.4 °F | 2.4 in. |
| November | 23.7 °F | 43.2 °F | 1.43 in. |
| December | 12.3 °F | 29.1 °F | 1.0 in. |
| Annual | 35.1 °F | 55.9 °F | 30.08 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |