Gladstone, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.1 °F (low) to 65 °F (high). Annual precipitation averages 42 Inches. Gladstone 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.0 °F | 38.3 °F | 1.36 in. |
| February | 23.0 °F | 43.6 °F | 1.62 in. |
| March | 32.7 °F | 55.0 °F | 2.44 in. |
| April | 43.1 °F | 65.4 °F | 3.97 in. |
| May | 54.2 °F | 74.6 °F | 5.6 in. |
| June | 63.8 °F | 84.0 °F | 5.55 in. |
| July | 68.0 °F | 88.4 °F | 4.66 in. |
| August | 65.9 °F | 87.2 °F | 4.78 in. |
| September | 57.1 °F | 79.6 °F | 4.44 in. |
| October | 44.9 °F | 67.6 °F | 3.52 in. |
| November | 33.5 °F | 53.8 °F | 2.3 in. |
| December | 23.8 °F | 42.3 °F | 1.77 in. |
| Annual | 44.1 °F | 65 °F | 42.01 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |