Laytonsville, Maryland has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.4 °C (low) to 17.9 °C (high). Annual precipitation averages 1183.4 Millimeters. Laytonsville 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 | -3.9 °C | 5.1 °C | 81.28 mm |
| February | -2.9 °C | 6.8 °C | 72.39 mm |
| March | 0.7 °C | 11.6 °C | 103.63 mm |
| April | 6.2 °C | 18.2 °C | 89.66 mm |
| May | 11.7 °C | 22.8 °C | 114.05 mm |
| June | 16.3 °C | 27.5 °C | 117.86 mm |
| July | 18.9 °C | 29.8 °C | 110.74 mm |
| August | 17.9 °C | 28.8 °C | 94.49 mm |
| September | 14.5 °C | 25.1 °C | 115.06 mm |
| October | 8 °C | 18.7 °C | 102.11 mm |
| November | 2.7 °C | 12.8 °C | 86.87 mm |
| December | -1.4 °C | 7.3 °C | 95.25 mm |
| Annual | 7.4 °C | 17.9 °C | 1183.39 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |