North Bethesda, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.3 °F (low) to 65.7 °F (high). Annual precipitation averages 45.2 Inches. North Bethesda is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.9 °F | 42.7 °F | 3.1 in. |
| February | 27.3 °F | 45.9 °F | 2.74 in. |
| March | 34.1 °F | 54.3 °F | 3.96 in. |
| April | 44.2 °F | 66.4 °F | 3.41 in. |
| May | 54.1 °F | 74.6 °F | 4.45 in. |
| June | 62.8 °F | 82.9 °F | 4.49 in. |
| July | 67.5 °F | 87.2 °F | 4.38 in. |
| August | 65.9 °F | 85.3 °F | 3.6 in. |
| September | 59.2 °F | 78.6 °F | 4.42 in. |
| October | 47.2 °F | 67.1 °F | 3.84 in. |
| November | 37.0 °F | 56.4 °F | 3.19 in. |
| December | 30.2 °F | 46.6 °F | 3.66 in. |
| Annual | 46.3 °F | 65.7 °F | 45.24 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |