McNeil, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52 °F (low) to 74.9 °F (high). Annual precipitation averages 55.8 Inches. McNeil is located in USDA Plant Hardiness Zone 8b. 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 | 33.2 °F | 55.0 °F | 4.48 in. |
| February | 36.0 °F | 59.2 °F | 4.71 in. |
| March | 42.9 °F | 67.3 °F | 5.71 in. |
| April | 50.6 °F | 75.1 °F | 5.62 in. |
| May | 60.1 °F | 81.8 °F | 5.18 in. |
| June | 67.9 °F | 88.9 °F | 4.43 in. |
| July | 71.0 °F | 92.6 °F | 3.65 in. |
| August | 69.9 °F | 93.0 °F | 3.38 in. |
| September | 63.5 °F | 87.2 °F | 3.88 in. |
| October | 51.5 °F | 76.7 °F | 4.91 in. |
| November | 41.9 °F | 65.3 °F | 4.26 in. |
| December | 35.4 °F | 57.1 °F | 5.57 in. |
| Annual | 52 °F | 74.9 °F | 55.78 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |