Webster, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.7 °C (low) to 27.9 °C (high). Annual precipitation averages 1316.7 Millimeters. Webster is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.7 °C | 21.1 °C | 75.95 mm |
| February | 9.3 °C | 22.7 °C | 59.18 mm |
| March | 11.3 °C | 25.3 °C | 81.28 mm |
| April | 14.6 °C | 28.2 °C | 66.55 mm |
| May | 17.9 °C | 31.1 °C | 83.82 mm |
| June | 21.4 °C | 32.3 °C | 194.82 mm |
| July | 22.3 °C | 32.8 °C | 202.18 mm |
| August | 22.6 °C | 32.7 °C | 205.23 mm |
| September | 21.6 °C | 31.8 °C | 167.64 mm |
| October | 17.6 °C | 29 °C | 68.33 mm |
| November | 12.4 °C | 25.2 °C | 46.99 mm |
| December | 9.6 °C | 22.3 °C | 64.77 mm |
| Annual | 15.7 °C | 27.9 °C | 1316.74 mm |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°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 |