Morriston, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.8 °C (low) to 27.7 °C (high). Annual precipitation averages 1405.6 Millimeters. Morriston is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.3 °C | 20.4 °C | 90.68 mm |
| February | 8.2 °C | 22.3 °C | 74.93 mm |
| March | 10.1 °C | 25 °C | 97.54 mm |
| April | 13.5 °C | 27.9 °C | 70.61 mm |
| May | 17.4 °C | 31.2 °C | 82.8 mm |
| June | 21.4 °C | 32.8 °C | 210.06 mm |
| July | 22.2 °C | 33 °C | 193.04 mm |
| August | 22.3 °C | 32.8 °C | 215.39 mm |
| September | 21.2 °C | 32.1 °C | 163.83 mm |
| October | 16.5 °C | 29 °C | 78.49 mm |
| November | 10.9 °C | 24.7 °C | 49.78 mm |
| December | 8 °C | 21.6 °C | 78.49 mm |
| Annual | 14.8 °C | 27.7 °C | 1405.64 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |