Bristol, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.5 °C (low) to 26.2 °C (high). Annual precipitation averages 1491.5 Millimeters. Bristol 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 | 4.3 °C | 17.3 °C | 123.19 mm |
| February | 5.9 °C | 19.4 °C | 112.52 mm |
| March | 8.8 °C | 23.1 °C | 132.33 mm |
| April | 12.3 °C | 26.6 °C | 111.76 mm |
| May | 16.9 °C | 30.5 °C | 95.25 mm |
| June | 20.8 °C | 32.5 °C | 158.24 mm |
| July | 22 °C | 33.3 °C | 161.54 mm |
| August | 21.9 °C | 32.7 °C | 156.97 mm |
| September | 19.9 °C | 31.1 °C | 166.62 mm |
| October | 14.4 °C | 27.5 °C | 83.31 mm |
| November | 8.6 °C | 22.2 °C | 88.39 mm |
| December | 5.8 °C | 18.5 °C | 101.35 mm |
| Annual | 13.5 °C | 26.2 °C | 1491.47 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |