Persia, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.9 °C (low) to 15.7 °C (high). Annual precipitation averages 854.7 Millimeters. Persia 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.2 °C | -0.8 °C | 19.56 mm |
| February | -9 °C | 1.9 °C | 25.4 mm |
| March | -2.8 °C | 9.3 °C | 46.74 mm |
| April | 3.2 °C | 16.4 °C | 87.63 mm |
| May | 10.1 °C | 22.3 °C | 126.75 mm |
| June | 16 °C | 27.7 °C | 127.76 mm |
| July | 18.1 °C | 29.6 °C | 96.01 mm |
| August | 16.6 °C | 28.4 °C | 104.65 mm |
| September | 11.4 °C | 25.1 °C | 84.07 mm |
| October | 4.6 °C | 18 °C | 65.79 mm |
| November | -2.5 °C | 9 °C | 37.59 mm |
| December | -8.1 °C | 1.9 °C | 32.77 mm |
| Annual | 3.9 °C | 15.7 °C | 854.72 mm |
| 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |