South Laurel, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 19 °C (high). Annual precipitation averages 1194.1 Millimeters. South Laurel 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 | -3.7 °C | 6.3 °C | 81.03 mm |
| February | -2.9 °C | 8 °C | 72.9 mm |
| March | 0.8 °C | 12.6 °C | 105.41 mm |
| April | 6.3 °C | 19.1 °C | 91.19 mm |
| May | 11.7 °C | 23.8 °C | 115.06 mm |
| June | 16.8 °C | 28.6 °C | 118.11 mm |
| July | 19.4 °C | 31 °C | 113.79 mm |
| August | 18.5 °C | 30 °C | 96.01 mm |
| September | 14.7 °C | 26.4 °C | 119.38 mm |
| October | 7.9 °C | 20 °C | 101.09 mm |
| November | 2.3 °C | 13.9 °C | 82.3 mm |
| December | -1.4 °C | 8.5 °C | 97.79 mm |
| Annual | 7.5 °C | 19 °C | 1194.06 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |