Monticello, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.2 °F (low) to 78.6 °F (high). Annual precipitation averages 58.2 Inches. Monticello is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.7 °F | 62.9 °F | 4.77 in. |
| February | 42.7 °F | 66.6 °F | 4.18 in. |
| March | 48.2 °F | 73.0 °F | 5.22 in. |
| April | 54.5 °F | 78.9 °F | 3.91 in. |
| May | 62.3 °F | 85.9 °F | 3.31 in. |
| June | 69.4 °F | 89.7 °F | 6.95 in. |
| July | 71.6 °F | 91.1 °F | 6.9 in. |
| August | 71.6 °F | 90.5 °F | 6.71 in. |
| September | 67.6 °F | 87.1 °F | 5.46 in. |
| October | 57.5 °F | 80.4 °F | 3.41 in. |
| November | 47.3 °F | 71.7 °F | 3.31 in. |
| December | 42.3 °F | 65.2 °F | 4.07 in. |
| Annual | 56.2 °F | 78.6 °F | 58.2 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |