Monroe City, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.8 °F (low) to 65.5 °F (high). Annual precipitation averages 47.9 Inches. Monroe City is located in USDA Plant Hardiness Zone 6b. 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 | 22.6 °F | 39.0 °F | 3.45 in. |
| February | 25.2 °F | 43.6 °F | 2.82 in. |
| March | 33.6 °F | 54.2 °F | 4.0 in. |
| April | 43.9 °F | 66.7 °F | 5.0 in. |
| May | 54.9 °F | 76.0 °F | 5.52 in. |
| June | 63.6 °F | 84.4 °F | 4.74 in. |
| July | 66.5 °F | 87.4 °F | 4.28 in. |
| August | 64.3 °F | 86.4 °F | 3.17 in. |
| September | 56.6 °F | 81.1 °F | 3.74 in. |
| October | 45.0 °F | 69.3 °F | 3.5 in. |
| November | 34.9 °F | 54.9 °F | 4.09 in. |
| December | 26.9 °F | 43.3 °F | 3.6 in. |
| Annual | 44.8 °F | 65.5 °F | 47.91 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 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 |