Perry, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.2 °F (low) to 59.3 °F (high). Annual precipitation averages 35.5 Inches. Perry 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 | 10.7 °F | 28.9 °F | 0.94 in. |
| February | 14.6 °F | 33.4 °F | 1.07 in. |
| March | 26.2 °F | 46.6 °F | 2.03 in. |
| April | 37.3 °F | 60.7 °F | 3.62 in. |
| May | 49.5 °F | 71.5 °F | 4.96 in. |
| June | 60.0 °F | 81.0 °F | 5.41 in. |
| July | 63.7 °F | 84.8 °F | 4.31 in. |
| August | 60.8 °F | 82.5 °F | 4.0 in. |
| September | 52.0 °F | 76.9 °F | 3.31 in. |
| October | 39.6 °F | 63.5 °F | 2.69 in. |
| November | 27.4 °F | 47.7 °F | 1.82 in. |
| December | 16.7 °F | 34.2 °F | 1.32 in. |
| Annual | 38.2 °F | 59.3 °F | 35.48 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 |