Shannon, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.2 °F (low) to 74 °F (high). Annual precipitation averages 57.6 Inches. Shannon is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.9 °F | 52.4 °F | 4.97 in. |
| February | 34.9 °F | 57.2 °F | 5.15 in. |
| March | 41.9 °F | 65.9 °F | 5.26 in. |
| April | 50.5 °F | 74.3 °F | 5.52 in. |
| May | 59.4 °F | 82.3 °F | 5.44 in. |
| June | 67.5 °F | 89.2 °F | 4.67 in. |
| July | 71.0 °F | 92.0 °F | 4.51 in. |
| August | 69.8 °F | 91.9 °F | 4.08 in. |
| September | 62.7 °F | 86.6 °F | 3.79 in. |
| October | 50.3 °F | 76.3 °F | 3.78 in. |
| November | 39.8 °F | 64.1 °F | 4.38 in. |
| December | 34.7 °F | 55.3 °F | 6.03 in. |
| Annual | 51.2 °F | 74 °F | 57.58 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |