Minier, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.5 °F (low) to 62.4 °F (high). Annual precipitation averages 38.8 Inches. Minier 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 | 16.7 °F | 33.4 °F | 2.21 in. |
| February | 20.2 °F | 38.2 °F | 1.95 in. |
| March | 29.8 °F | 50.4 °F | 2.62 in. |
| April | 40.4 °F | 63.6 °F | 3.82 in. |
| May | 52.0 °F | 74.1 °F | 4.64 in. |
| June | 61.5 °F | 82.9 °F | 4.33 in. |
| July | 64.5 °F | 85.9 °F | 3.97 in. |
| August | 62.3 °F | 84.3 °F | 3.6 in. |
| September | 54.3 °F | 79.4 °F | 3.31 in. |
| October | 42.6 °F | 66.3 °F | 3.2 in. |
| November | 31.7 °F | 51.2 °F | 2.87 in. |
| December | 22.5 °F | 38.6 °F | 2.26 in. |
| Annual | 41.5 °F | 62.4 °F | 38.78 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 |