Monroe City, 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 40.7 Inches. Monroe City 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 | 18.8 °F | 36.2 °F | 2.02 in. |
| February | 22.0 °F | 41.0 °F | 2.09 in. |
| March | 31.9 °F | 52.9 °F | 2.84 in. |
| April | 42.7 °F | 65.1 °F | 4.27 in. |
| May | 53.6 °F | 74.7 °F | 4.93 in. |
| June | 63.2 °F | 83.6 °F | 4.84 in. |
| July | 66.7 °F | 87.5 °F | 4.17 in. |
| August | 64.7 °F | 85.9 °F | 3.83 in. |
| September | 56.1 °F | 79.3 °F | 3.58 in. |
| October | 44.5 °F | 67.1 °F | 3.26 in. |
| November | 33.3 °F | 52.9 °F | 2.8 in. |
| December | 24.0 °F | 40.5 °F | 2.11 in. |
| Annual | 43.5 °F | 63.9 °F | 40.74 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |