Gloster, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 24.8 °C (high). Annual precipitation averages 1358.9 Millimeters. Gloster is located in USDA Plant Hardiness Zone 8b. 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 | 2.3 °C | 14.2 °C | 124.71 mm |
| February | 4.3 °C | 16.7 °C | 115.82 mm |
| March | 7.8 °C | 20.7 °C | 131.57 mm |
| April | 11.8 °C | 24.7 °C | 124.21 mm |
| May | 16.9 °C | 28.6 °C | 117.09 mm |
| June | 20.9 °C | 32.1 °C | 112.52 mm |
| July | 22.6 °C | 34 °C | 97.28 mm |
| August | 22.2 °C | 34.3 °C | 86.36 mm |
| September | 18.4 °C | 31.3 °C | 91.69 mm |
| October | 12.3 °C | 25.9 °C | 115.32 mm |
| November | 6.9 °C | 19.7 °C | 108.46 mm |
| December | 3.4 °C | 15.1 °C | 133.86 mm |
| Annual | 12.5 °C | 24.8 °C | 1358.89 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°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 |