Montrose, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.7 °F (low) to 66.2 °F (high). Annual precipitation averages 43.6 Inches. Montrose is located in USDA Plant Hardiness Zone 6b. 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 | 20.8 °F | 40.8 °F | 1.78 in. |
| February | 24.4 °F | 45.9 °F | 1.97 in. |
| March | 33.7 °F | 56.4 °F | 3.0 in. |
| April | 43.4 °F | 66.5 °F | 4.55 in. |
| May | 54.3 °F | 75.1 °F | 5.83 in. |
| June | 63.9 °F | 84.0 °F | 4.99 in. |
| July | 68.0 °F | 88.8 °F | 4.54 in. |
| August | 65.9 °F | 87.7 °F | 4.0 in. |
| September | 57.3 °F | 80.0 °F | 4.22 in. |
| October | 45.1 °F | 68.8 °F | 3.34 in. |
| November | 34.3 °F | 55.8 °F | 3.05 in. |
| December | 25.2 °F | 44.7 °F | 2.33 in. |
| Annual | 44.7 °F | 66.2 °F | 43.6 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 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 |