Conroe, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.6 °F (low) to 79.3 °F (high). Annual precipitation averages 50.2 Inches. Conroe is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.5 °F | 62.1 °F | 4.24 in. |
| February | 44.1 °F | 65.8 °F | 3.23 in. |
| March | 50.5 °F | 72.4 °F | 3.75 in. |
| April | 56.9 °F | 78.9 °F | 3.51 in. |
| May | 65.2 °F | 85.8 °F | 5.03 in. |
| June | 71.3 °F | 91.6 °F | 4.73 in. |
| July | 73.4 °F | 93.8 °F | 3.37 in. |
| August | 72.9 °F | 94.9 °F | 4.22 in. |
| September | 68.0 °F | 89.9 °F | 4.05 in. |
| October | 58.3 °F | 81.9 °F | 5.23 in. |
| November | 48.6 °F | 71.3 °F | 4.67 in. |
| December | 42.0 °F | 63.4 °F | 4.15 in. |
| Annual | 57.6 °F | 79.3 °F | 50.18 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| 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 |