South English, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.4 °F (low) to 59.6 °F (high). Annual precipitation averages 37.8 Inches. South English 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.6 °F | 29.6 °F | 1.21 in. |
| February | 16.2 °F | 34.3 °F | 1.45 in. |
| March | 27.1 °F | 47.5 °F | 2.23 in. |
| April | 38.4 °F | 60.9 °F | 3.77 in. |
| May | 50.6 °F | 71.5 °F | 5.07 in. |
| June | 61.0 °F | 81.1 °F | 5.2 in. |
| July | 64.2 °F | 84.6 °F | 4.11 in. |
| August | 61.6 °F | 82.8 °F | 4.66 in. |
| September | 52.6 °F | 76.4 °F | 3.4 in. |
| October | 40.6 °F | 63.5 °F | 2.97 in. |
| November | 28.9 °F | 48.1 °F | 2.08 in. |
| December | 18.6 °F | 35.1 °F | 1.62 in. |
| Annual | 39.4 °F | 59.6 °F | 37.77 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |