Stanley, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.4 °C (low) to 25 °C (high). Annual precipitation averages 1376.9 Millimeters. Stanley 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 | 2.4 °C | 14.7 °C | 131.57 mm |
| February | 4.3 °C | 17.2 °C | 118.87 mm |
| March | 7.9 °C | 21.1 °C | 135.64 mm |
| April | 11.8 °C | 24.9 °C | 126.49 mm |
| May | 16.9 °C | 28.8 °C | 116.33 mm |
| June | 20.9 °C | 32.2 °C | 111.25 mm |
| July | 22.4 °C | 34.1 °C | 93.22 mm |
| August | 21.9 °C | 34.4 °C | 86.11 mm |
| September | 18.5 °C | 31.4 °C | 89.41 mm |
| October | 12.1 °C | 26.2 °C | 118.11 mm |
| November | 6.8 °C | 19.9 °C | 112.01 mm |
| December | 3.4 °C | 15.5 °C | 137.92 mm |
| Annual | 12.4 °C | 25 °C | 1376.93 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 |