Bartow, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 62.6 °F (low) to 83.4 °F (high). Annual precipitation averages 53.8 Inches. Bartow is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 49.2 °F | 72.1 °F | 2.72 in. |
| February | 52.1 °F | 75.3 °F | 2.24 in. |
| March | 55.7 °F | 79.2 °F | 2.95 in. |
| April | 60.9 °F | 83.8 °F | 2.95 in. |
| May | 66.5 °F | 88.3 °F | 3.49 in. |
| June | 71.5 °F | 90.6 °F | 8.43 in. |
| July | 73.3 °F | 91.4 °F | 8.26 in. |
| August | 73.5 °F | 91.4 °F | 8.15 in. |
| September | 72.2 °F | 89.9 °F | 7.36 in. |
| October | 66.4 °F | 85.2 °F | 2.98 in. |
| November | 57.8 °F | 78.7 °F | 1.66 in. |
| December | 52.6 °F | 74.5 °F | 2.63 in. |
| Annual | 62.6 °F | 83.4 °F | 53.82 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |