Fountain Springs, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.1 °C (low) to 14.8 °C (high). Annual precipitation averages 1238.8 Millimeters. Fountain Springs 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 | 1.1 °C | 88.14 mm |
| February | -7.1 °C | 2.7 °C | 67.31 mm |
| March | -2.9 °C | 7.4 °C | 95.5 mm |
| April | 3.1 °C | 14.5 °C | 103.63 mm |
| May | 8.6 °C | 20.3 °C | 106.43 mm |
| June | 13.4 °C | 24.7 °C | 118.87 mm |
| July | 15.9 °C | 27.6 °C | 118.62 mm |
| August | 14.8 °C | 26.6 °C | 106.93 mm |
| September | 11.1 °C | 22.8 °C | 129.29 mm |
| October | 5.2 °C | 16.1 °C | 117.09 mm |
| November | -0.2 °C | 9.5 °C | 91.69 mm |
| December | -4.5 °C | 3.8 °C | 95.25 mm |
| Annual | 4.1 °C | 14.8 °C | 1238.75 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 |