Montrose, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.1 °C (low) to 19 °C (high). Annual precipitation averages 1107.5 Millimeters. 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 | -6.2 °C | 4.9 °C | 45.21 mm |
| February | -4.2 °C | 7.7 °C | 50.04 mm |
| March | 0.9 °C | 13.6 °C | 76.2 mm |
| April | 6.3 °C | 19.2 °C | 115.57 mm |
| May | 12.4 °C | 23.9 °C | 148.08 mm |
| June | 17.7 °C | 28.9 °C | 126.75 mm |
| July | 20 °C | 31.6 °C | 115.32 mm |
| August | 18.8 °C | 30.9 °C | 101.6 mm |
| September | 14.1 °C | 26.7 °C | 107.19 mm |
| October | 7.3 °C | 20.4 °C | 84.84 mm |
| November | 1.3 °C | 13.2 °C | 77.47 mm |
| December | -3.8 °C | 7.1 °C | 59.18 mm |
| Annual | 7.1 °C | 19 °C | 1107.45 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |