Capron, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38 °F (low) to 57.7 °F (high). Annual precipitation averages 37.8 Inches. Capron 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 | 13.0 °F | 28.7 °F | 1.67 in. |
| February | 15.8 °F | 32.8 °F | 1.67 in. |
| March | 25.6 °F | 44.6 °F | 2.19 in. |
| April | 36.0 °F | 57.7 °F | 3.69 in. |
| May | 47.4 °F | 69.3 °F | 4.43 in. |
| June | 57.3 °F | 79.0 °F | 5.27 in. |
| July | 61.4 °F | 82.6 °F | 3.89 in. |
| August | 59.6 °F | 80.9 °F | 4.08 in. |
| September | 51.7 °F | 74.4 °F | 3.64 in. |
| October | 40.2 °F | 61.4 °F | 2.88 in. |
| November | 29.4 °F | 46.5 °F | 2.37 in. |
| December | 18.9 °F | 33.9 °F | 1.98 in. |
| Annual | 38 °F | 57.7 °F | 37.76 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |