Summit, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.5 °F (low) to 76.8 °F (high). Annual precipitation averages 66 Inches. Summit is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.4 °F | 59.2 °F | 6.56 in. |
| February | 40.5 °F | 63.5 °F | 5.82 in. |
| March | 46.7 °F | 70.6 °F | 5.93 in. |
| April | 53.3 °F | 76.7 °F | 5.87 in. |
| May | 61.7 °F | 83.7 °F | 4.73 in. |
| June | 68.9 °F | 89.4 °F | 5.72 in. |
| July | 71.0 °F | 91.1 °F | 6.41 in. |
| August | 70.5 °F | 91.3 °F | 6.09 in. |
| September | 65.6 °F | 87.2 °F | 4.41 in. |
| October | 54.3 °F | 79.1 °F | 4.22 in. |
| November | 44.7 °F | 68.6 °F | 4.6 in. |
| December | 39.5 °F | 61.1 °F | 5.67 in. |
| Annual | 54.5 °F | 76.8 °F | 66.03 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |