Humphreys, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.5 °F (low) to 62.5 °F (high). Annual precipitation averages 40.2 Inches. Humphreys 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 | 15.7 °F | 34.3 °F | 1.18 in. |
| February | 19.8 °F | 39.7 °F | 1.6 in. |
| March | 29.9 °F | 51.8 °F | 2.43 in. |
| April | 40.7 °F | 63.1 °F | 3.83 in. |
| May | 52.0 °F | 72.9 °F | 5.75 in. |
| June | 61.9 °F | 82.3 °F | 5.08 in. |
| July | 65.9 °F | 86.5 °F | 4.68 in. |
| August | 63.4 °F | 85.1 °F | 4.22 in. |
| September | 54.6 °F | 78.1 °F | 4.26 in. |
| October | 42.5 °F | 65.5 °F | 3.22 in. |
| November | 31.0 °F | 51.6 °F | 2.3 in. |
| December | 20.9 °F | 38.9 °F | 1.64 in. |
| Annual | 41.5 °F | 62.5 °F | 40.19 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 |