Houstonia, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.6 °F (low) to 65 °F (high). Annual precipitation averages 42.6 Inches. Houstonia is located in USDA Plant Hardiness Zone 6b. 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 | 20.1 °F | 38.6 °F | 1.61 in. |
| February | 24.2 °F | 43.9 °F | 2.0 in. |
| March | 33.6 °F | 54.8 °F | 2.82 in. |
| April | 43.5 °F | 65.4 °F | 4.48 in. |
| May | 54.6 °F | 74.8 °F | 5.44 in. |
| June | 64.1 °F | 83.7 °F | 4.95 in. |
| July | 68.0 °F | 87.8 °F | 4.81 in. |
| August | 65.7 °F | 86.7 °F | 4.14 in. |
| September | 56.8 °F | 79.3 °F | 4.18 in. |
| October | 45.0 °F | 68.0 °F | 3.47 in. |
| November | 34.2 °F | 54.2 °F | 2.67 in. |
| December | 25.0 °F | 42.6 °F | 2.03 in. |
| Annual | 44.6 °F | 65 °F | 42.6 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 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 |