Montgomery, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.5 °F (low) to 79.1 °F (high). Annual precipitation averages 49.1 Inches. Montgomery 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 | 40.2 °F | 61.6 °F | 4.12 in. |
| February | 43.8 °F | 65.4 °F | 3.27 in. |
| March | 50.1 °F | 72.1 °F | 3.48 in. |
| April | 56.7 °F | 78.6 °F | 3.69 in. |
| May | 65.0 °F | 85.5 °F | 5.15 in. |
| June | 71.2 °F | 91.3 °F | 4.39 in. |
| July | 73.2 °F | 94.0 °F | 2.96 in. |
| August | 72.8 °F | 95.1 °F | 4.04 in. |
| September | 67.9 °F | 89.8 °F | 4.13 in. |
| October | 58.0 °F | 81.6 °F | 4.9 in. |
| November | 48.6 °F | 71.0 °F | 4.77 in. |
| December | 41.9 °F | 63.1 °F | 4.17 in. |
| Annual | 57.5 °F | 79.1 °F | 49.07 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 |