Momence, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.6 °F (low) to 60.5 °F (high). Annual precipitation averages 39.3 Inches. Momence is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.3 °F | 32.1 °F | 2.23 in. |
| February | 19.3 °F | 36.4 °F | 1.92 in. |
| March | 28.7 °F | 47.9 °F | 2.35 in. |
| April | 38.8 °F | 60.9 °F | 3.64 in. |
| May | 50.2 °F | 72.0 °F | 4.32 in. |
| June | 60.0 °F | 81.2 °F | 4.72 in. |
| July | 63.5 °F | 84.3 °F | 4.54 in. |
| August | 61.5 °F | 82.7 °F | 3.98 in. |
| September | 53.6 °F | 77.4 °F | 3.39 in. |
| October | 42.0 °F | 64.5 °F | 3.36 in. |
| November | 31.6 °F | 49.6 °F | 2.67 in. |
| December | 22.1 °F | 37.3 °F | 2.14 in. |
| Annual | 40.6 °F | 60.5 °F | 39.26 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |