Mosby, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43 °F (low) to 64.3 °F (high). Annual precipitation averages 41.5 Inches. Mosby is located in USDA Plant Hardiness Zone 6a. 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 | 18.2 °F | 37.8 °F | 1.22 in. |
| February | 22.3 °F | 43.3 °F | 1.65 in. |
| March | 31.7 °F | 54.1 °F | 2.51 in. |
| April | 41.7 °F | 64.4 °F | 4.01 in. |
| May | 52.9 °F | 74.0 °F | 5.62 in. |
| June | 63.0 °F | 83.3 °F | 5.36 in. |
| July | 67.3 °F | 87.4 °F | 4.89 in. |
| August | 64.4 °F | 86.3 °F | 4.44 in. |
| September | 55.4 °F | 78.8 °F | 4.44 in. |
| October | 43.5 °F | 67.2 °F | 3.48 in. |
| November | 32.1 °F | 53.4 °F | 2.16 in. |
| December | 22.9 °F | 41.9 °F | 1.7 in. |
| Annual | 43 °F | 64.3 °F | 41.48 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 6a : -10°F to -5°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 |