Bryant, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 62.1 °F (high). Annual precipitation averages 39.5 Inches. Bryant is located in USDA Plant Hardiness Zone 6a. 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 | 16.0 °F | 33.2 °F | 1.86 in. |
| February | 19.6 °F | 37.8 °F | 1.96 in. |
| March | 29.6 °F | 50.3 °F | 2.52 in. |
| April | 40.2 °F | 63.2 °F | 4.01 in. |
| May | 52.1 °F | 73.7 °F | 5.19 in. |
| June | 61.6 °F | 82.6 °F | 4.76 in. |
| July | 64.7 °F | 85.8 °F | 4.1 in. |
| August | 62.4 °F | 84.4 °F | 3.55 in. |
| September | 54.1 °F | 78.8 °F | 3.58 in. |
| October | 42.3 °F | 66.1 °F | 3.05 in. |
| November | 31.2 °F | 50.9 °F | 2.69 in. |
| December | 21.8 °F | 38.5 °F | 2.21 in. |
| Annual | 41.3 °F | 62.1 °F | 39.48 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 6a : -10°F to -5°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 |