Glenaire, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.8 °F (low) to 64.9 °F (high). Annual precipitation averages 41.6 Inches. Glenaire 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.9 °F | 38.3 °F | 1.27 in. |
| February | 22.8 °F | 43.8 °F | 1.56 in. |
| March | 32.4 °F | 54.8 °F | 2.45 in. |
| April | 42.7 °F | 65.2 °F | 3.97 in. |
| May | 53.9 °F | 74.5 °F | 5.67 in. |
| June | 63.8 °F | 83.9 °F | 5.47 in. |
| July | 68.2 °F | 88.1 °F | 4.67 in. |
| August | 65.7 °F | 87.0 °F | 4.75 in. |
| September | 56.6 °F | 79.3 °F | 4.44 in. |
| October | 44.4 °F | 67.6 °F | 3.47 in. |
| November | 33.0 °F | 53.8 °F | 2.23 in. |
| December | 23.6 °F | 42.3 °F | 1.67 in. |
| Annual | 43.8 °F | 64.9 °F | 41.62 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |