Tall Timbers, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.2 °F (low) to 66.7 °F (high). Annual precipitation averages 45.9 Inches. Tall Timbers is located in USDA Plant Hardiness Zone 8a. 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 | 29.6 °F | 45.1 °F | 3.26 in. |
| February | 31.0 °F | 47.5 °F | 2.82 in. |
| March | 37.6 °F | 54.4 °F | 4.09 in. |
| April | 47.6 °F | 66.0 °F | 3.38 in. |
| May | 57.6 °F | 74.6 °F | 3.86 in. |
| June | 66.4 °F | 83.1 °F | 4.2 in. |
| July | 71.2 °F | 87.0 °F | 4.62 in. |
| August | 69.6 °F | 85.1 °F | 4.28 in. |
| September | 63.6 °F | 79.7 °F | 4.25 in. |
| October | 52.2 °F | 69.3 °F | 4.25 in. |
| November | 41.5 °F | 58.1 °F | 3.24 in. |
| December | 34.4 °F | 49.9 °F | 3.68 in. |
| Annual | 50.2 °F | 66.7 °F | 45.93 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |