Dalton, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.5 °F (low) to 63.9 °F (high). Annual precipitation averages 40.8 Inches. Dalton 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.4 °F | 36.8 °F | 1.4 in. |
| February | 22.4 °F | 42.1 °F | 1.87 in. |
| March | 32.2 °F | 53.5 °F | 2.75 in. |
| April | 42.7 °F | 64.7 °F | 4.16 in. |
| May | 53.8 °F | 74.2 °F | 5.51 in. |
| June | 63.5 °F | 83.0 °F | 5.33 in. |
| July | 67.3 °F | 86.9 °F | 4.54 in. |
| August | 64.8 °F | 85.7 °F | 3.91 in. |
| September | 55.8 °F | 78.8 °F | 3.66 in. |
| October | 44.2 °F | 67.1 °F | 3.28 in. |
| November | 32.9 °F | 53.3 °F | 2.55 in. |
| December | 23.4 °F | 41.1 °F | 1.84 in. |
| Annual | 43.5 °F | 63.9 °F | 40.8 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 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 |