Fidelity, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.2 °F (low) to 64.3 °F (high). Annual precipitation averages 40.7 Inches. Fidelity is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.4 °F | 37.3 °F | 2.46 in. |
| February | 24.7 °F | 42.7 °F | 2.13 in. |
| March | 33.8 °F | 53.4 °F | 3.2 in. |
| April | 44.3 °F | 65.2 °F | 4.54 in. |
| May | 55.4 °F | 74.8 °F | 5.16 in. |
| June | 64.5 °F | 83.4 °F | 3.71 in. |
| July | 67.7 °F | 86.6 °F | 3.47 in. |
| August | 65.7 °F | 85.6 °F | 3.66 in. |
| September | 57.2 °F | 79.5 °F | 3.31 in. |
| October | 45.9 °F | 67.7 °F | 3.27 in. |
| November | 35.1 °F | 53.4 °F | 3.16 in. |
| December | 26.2 °F | 42.1 °F | 2.62 in. |
| Annual | 45.2 °F | 64.3 °F | 40.69 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |