Strong, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.1 °C (low) to 15.1 °C (high). Annual precipitation averages 1259.3 Millimeters. Strong is located in USDA Plant Hardiness Zone 6b. 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 | -7.9 °C | 1.4 °C | 91.44 mm |
| February | -7.2 °C | 2.9 °C | 68.33 mm |
| March | -2.9 °C | 7.7 °C | 99.06 mm |
| April | 3.1 °C | 15 °C | 106.17 mm |
| May | 8.5 °C | 20.8 °C | 108.71 mm |
| June | 13.4 °C | 25.2 °C | 121.92 mm |
| July | 15.8 °C | 28.1 °C | 116.84 mm |
| August | 14.8 °C | 27 °C | 109.73 mm |
| September | 11.1 °C | 23.2 °C | 131.32 mm |
| October | 5.1 °C | 16.4 °C | 117.35 mm |
| November | -0.2 °C | 9.7 °C | 92.2 mm |
| December | -4.4 °C | 3.9 °C | 96.27 mm |
| Annual | 4.1 °C | 15.1 °C | 1259.34 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |