Prince Frederick, Maryland has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 19.6 °C (high). Annual precipitation averages 1162.6 Millimeters. Prince Frederick is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.1 °C | 7.6 °C | 80.52 mm |
| February | -1.6 °C | 9.1 °C | 70.36 mm |
| March | 2 °C | 13.3 °C | 98.3 mm |
| April | 7.6 °C | 19.8 °C | 81.53 mm |
| May | 13.1 °C | 24.2 °C | 108.71 mm |
| June | 18.4 °C | 28.7 °C | 109.22 mm |
| July | 21.2 °C | 30.9 °C | 112.78 mm |
| August | 20.5 °C | 29.9 °C | 110.24 mm |
| September | 17.2 °C | 26.7 °C | 114.05 mm |
| October | 10.9 °C | 20.7 °C | 102.87 mm |
| November | 5.1 °C | 14.8 °C | 78.99 mm |
| December | 0.8 °C | 9.9 °C | 95 mm |
| Annual | 9.4 °C | 19.6 °C | 1162.57 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |