Blue Mountain, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 22.1 °C (high). Annual precipitation averages 1461.5 Millimeters. Blue Mountain is located in USDA Plant Hardiness Zone 7b. 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 | -1.1 °C | 10.1 °C | 122.68 mm |
| February | 0.4 °C | 12.6 °C | 127.25 mm |
| March | 4.4 °C | 17.6 °C | 136.14 mm |
| April | 9.1 °C | 22.7 °C | 144.27 mm |
| May | 14.4 °C | 26.7 °C | 131.57 mm |
| June | 18.8 °C | 30.6 °C | 119.38 mm |
| July | 20.8 °C | 32.2 °C | 118.36 mm |
| August | 19.8 °C | 32.1 °C | 91.69 mm |
| September | 16 °C | 29.2 °C | 99.82 mm |
| October | 9.2 °C | 23.3 °C | 100.08 mm |
| November | 3.6 °C | 16.8 °C | 111.25 mm |
| December | 0.6 °C | 11.6 °C | 159 mm |
| Annual | 9.7 °C | 22.1 °C | 1461.49 mm |
| 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |