Fredericksburg, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 14.7 °C (high). Annual precipitation averages 1208.8 Millimeters. Fredericksburg is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 3.1 °C | 84.58 mm |
| February | -5.6 °C | 4.7 °C | 66.55 mm |
| March | -1.4 °C | 9.6 °C | 99.06 mm |
| April | 4.2 °C | 16.8 °C | 98.81 mm |
| May | 9.9 °C | 22.3 °C | 99.57 mm |
| June | 15.1 °C | 27.2 °C | 121.16 mm |
| July | 17.4 °C | 29.7 °C | 117.6 mm |
| August | 16.4 °C | 28.7 °C | 107.44 mm |
| September | 12.5 °C | 24.9 °C | 123.44 mm |
| October | 6.1 °C | 18.2 °C | 109.73 mm |
| November | 0.8 °C | 11.7 °C | 85.34 mm |
| December | -3.3 °C | 5.7 °C | 97.03 mm |
| Annual | 5.5 °C | 16.9 °C | 1210.31 mm |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.2 °C | 0.7 °C | 95.25 mm |
| February | -8.2 °C | 2.1 °C | 66.8 mm |
| March | -3.9 °C | 7.1 °C | 84.84 mm |
| April | 1.9 °C | 14.6 °C | 99.31 mm |
| May | 7.8 °C | 20.8 °C | 102.87 mm |
| June | 12.8 °C | 25.2 °C | 125.73 mm |
| July | 15.1 °C | 27.4 °C | 123.19 mm |
| August | 14.2 °C | 26.7 °C | 104.14 mm |
| September | 10.6 °C | 23 °C | 112.01 mm |
| October | 4.9 °C | 16.4 °C | 107.19 mm |
| November | 0 °C | 9.4 °C | 90.68 mm |
| December | -4.5 °C | 3.4 °C | 96.77 mm |
| Annual | 3.5 °C | 14.7 °C | 1208.78 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |