Belle Rive, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.5 °C (low) to 18.7 °C (high). Annual precipitation averages 1158.5 Millimeters. Belle Rive 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.9 °C | 4.2 °C | 80.77 mm |
| February | -3.3 °C | 6.9 °C | 70.1 mm |
| March | 1.4 °C | 12.6 °C | 99.06 mm |
| April | 7.2 °C | 19.1 °C | 125.98 mm |
| May | 13 °C | 24.2 °C | 129.79 mm |
| June | 17.8 °C | 29.1 °C | 119.63 mm |
| July | 19.7 °C | 30.8 °C | 102.36 mm |
| August | 18.3 °C | 30.3 °C | 82.04 mm |
| September | 13.9 °C | 27 °C | 81.28 mm |
| October | 7.4 °C | 20.6 °C | 85.85 mm |
| November | 1.8 °C | 12.7 °C | 101.85 mm |
| December | -2.7 °C | 6.5 °C | 79.76 mm |
| Annual | 7.5 °C | 18.7 °C | 1158.47 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |