Sun, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.1 °F (low) to 78.2 °F (high). Annual precipitation averages 63.4 Inches. Sun is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.3 °F | 61.6 °F | 5.49 in. |
| February | 42.5 °F | 65.2 °F | 4.85 in. |
| March | 48.8 °F | 72.0 °F | 5.26 in. |
| April | 54.9 °F | 78.5 °F | 5.04 in. |
| May | 63.1 °F | 85.2 °F | 5.41 in. |
| June | 69.9 °F | 90.4 °F | 6.22 in. |
| July | 72.1 °F | 92.0 °F | 6.71 in. |
| August | 71.8 °F | 91.7 °F | 6.31 in. |
| September | 67.4 °F | 87.9 °F | 4.79 in. |
| October | 56.1 °F | 80.2 °F | 3.94 in. |
| November | 46.1 °F | 70.4 °F | 4.0 in. |
| December | 41.3 °F | 63.6 °F | 5.42 in. |
| Annual | 56.1 °F | 78.2 °F | 63.44 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |