Miller, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.9 °F (low) to 67.1 °F (high). Annual precipitation averages 46.3 Inches. Miller is located in USDA Plant Hardiness Zone 7a. 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 | 23.5 °F | 43.1 °F | 2.43 in. |
| February | 26.7 °F | 47.7 °F | 2.12 in. |
| March | 35.4 °F | 57.3 °F | 3.65 in. |
| April | 44.9 °F | 66.8 °F | 4.85 in. |
| May | 54.9 °F | 75.0 °F | 6.11 in. |
| June | 63.9 °F | 83.8 °F | 5.0 in. |
| July | 67.9 °F | 88.6 °F | 3.94 in. |
| August | 66.3 °F | 88.5 °F | 3.48 in. |
| September | 58.3 °F | 81.0 °F | 4.48 in. |
| October | 46.5 °F | 69.7 °F | 3.69 in. |
| November | 35.7 °F | 56.8 °F | 3.67 in. |
| December | 27.2 °F | 46.6 °F | 2.91 in. |
| Annual | 45.9 °F | 67.1 °F | 46.33 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |