Beltsville, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46 °F (low) to 66.4 °F (high). Annual precipitation averages 46 Inches. Beltsville 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 | 25.8 °F | 43.4 °F | 3.12 in. |
| February | 27.3 °F | 46.5 °F | 2.75 in. |
| March | 33.9 °F | 54.7 °F | 4.01 in. |
| April | 43.7 °F | 66.6 °F | 3.5 in. |
| May | 53.5 °F | 75.1 °F | 4.5 in. |
| June | 62.8 °F | 83.5 °F | 4.61 in. |
| July | 67.5 °F | 88.1 °F | 4.44 in. |
| August | 65.7 °F | 86.2 °F | 3.71 in. |
| September | 59.0 °F | 79.6 °F | 4.59 in. |
| October | 46.7 °F | 68.1 °F | 3.89 in. |
| November | 36.5 °F | 57.1 °F | 3.17 in. |
| December | 29.9 °F | 47.4 °F | 3.74 in. |
| Annual | 46 °F | 66.4 °F | 46.03 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |