Dunnellon, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 58.7 °F (low) to 81.8 °F (high). Annual precipitation averages 56 Inches. Dunnellon is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.3 °F | 69.3 °F | 3.25 in. |
| February | 46.5 °F | 72.0 °F | 3.34 in. |
| March | 50.3 °F | 76.9 °F | 3.62 in. |
| April | 56.6 °F | 82.0 °F | 2.48 in. |
| May | 63.3 °F | 87.7 °F | 3.23 in. |
| June | 70.2 °F | 90.3 °F | 8.59 in. |
| July | 71.8 °F | 90.8 °F | 8.29 in. |
| August | 72.2 °F | 90.6 °F | 8.52 in. |
| September | 70.2 °F | 89.3 °F | 6.68 in. |
| October | 61.7 °F | 84.0 °F | 2.83 in. |
| November | 52.0 °F | 77.0 °F | 1.96 in. |
| December | 46.5 °F | 71.3 °F | 3.23 in. |
| Annual | 58.7 °F | 81.8 °F | 56.02 in. |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |