College Springs, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.1 °F (low) to 61.5 °F (high). Annual precipitation averages 35.9 Inches. College Springs 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 | 13.3 °F | 32.5 °F | 0.82 in. |
| February | 17.9 °F | 38.0 °F | 1.1 in. |
| March | 28.3 °F | 50.6 °F | 2.03 in. |
| April | 38.7 °F | 62.4 °F | 3.4 in. |
| May | 50.8 °F | 72.5 °F | 5.57 in. |
| June | 61.1 °F | 81.6 °F | 5.25 in. |
| July | 65.3 °F | 85.4 °F | 4.59 in. |
| August | 62.8 °F | 83.9 °F | 3.77 in. |
| September | 53.5 °F | 77.7 °F | 3.26 in. |
| October | 41.2 °F | 65.6 °F | 2.85 in. |
| November | 29.0 °F | 50.0 °F | 1.92 in. |
| December | 18.9 °F | 37.5 °F | 1.32 in. |
| Annual | 40.1 °F | 61.5 °F | 35.88 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 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 |