Momence, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.9 °C (high). Annual precipitation averages 997.2 Millimeters. 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 | -8.7 °C | 0.1 °C | 56.64 mm |
| February | -7.1 °C | 2.4 °C | 48.77 mm |
| March | -1.8 °C | 8.8 °C | 59.69 mm |
| April | 3.8 °C | 16.1 °C | 92.46 mm |
| May | 10.1 °C | 22.2 °C | 109.73 mm |
| June | 15.6 °C | 27.3 °C | 119.89 mm |
| July | 17.5 °C | 29.1 °C | 115.32 mm |
| August | 16.4 °C | 28.2 °C | 101.09 mm |
| September | 12 °C | 25.2 °C | 86.11 mm |
| October | 5.6 °C | 18.1 °C | 85.34 mm |
| November | -0.2 °C | 9.8 °C | 67.82 mm |
| December | -5.5 °C | 2.9 °C | 54.36 mm |
| Annual | 4.8 °C | 15.9 °C | 997.22 mm |
| 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 : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |