Campbellton, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.1 °C (low) to 25.7 °C (high). Annual precipitation averages 1507 Millimeters. Campbellton 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.6 °C | 16.3 °C | 126.75 mm |
| February | 5.3 °C | 18.4 °C | 133.1 mm |
| March | 8.4 °C | 22.3 °C | 135.38 mm |
| April | 12.2 °C | 26 °C | 125.48 mm |
| May | 17.1 °C | 30.1 °C | 97.79 mm |
| June | 21.1 °C | 32.3 °C | 147.83 mm |
| July | 22.2 °C | 33.2 °C | 162.56 mm |
| August | 22 °C | 32.8 °C | 144.27 mm |
| September | 19.5 °C | 31 °C | 126.24 mm |
| October | 13.6 °C | 26.8 °C | 79.5 mm |
| November | 7.5 °C | 21.5 °C | 102.87 mm |
| December | 5.1 °C | 17.6 °C | 125.22 mm |
| Annual | 13.1 °C | 25.7 °C | 1506.99 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |