Barnard, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.6 °F (low) to 62.8 °F (high). Annual precipitation averages 37.8 Inches. Barnard 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 | 15.4 °F | 34.4 °F | 0.87 in. |
| February | 19.7 °F | 39.8 °F | 1.26 in. |
| March | 29.9 °F | 52.3 °F | 2.31 in. |
| April | 40.5 °F | 63.5 °F | 3.79 in. |
| May | 52.3 °F | 73.6 °F | 5.28 in. |
| June | 62.3 °F | 82.7 °F | 5.15 in. |
| July | 66.3 °F | 86.9 °F | 5.08 in. |
| August | 63.8 °F | 85.4 °F | 4.08 in. |
| September | 54.8 °F | 78.5 °F | 3.62 in. |
| October | 42.4 °F | 66.3 °F | 3.04 in. |
| November | 30.8 °F | 51.7 °F | 1.89 in. |
| December | 20.5 °F | 38.9 °F | 1.45 in. |
| Annual | 41.6 °F | 62.8 °F | 37.82 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 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 |