Three Springs, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 17 °C (high). Annual precipitation averages 1049 Millimeters. Three Springs is located in USDA Plant Hardiness Zone 7a. 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 | -6.4 °C | 3.3 °C | 71.63 mm |
| February | -5.8 °C | 5.1 °C | 60.96 mm |
| March | -1.8 °C | 9.8 °C | 88.65 mm |
| April | 3.6 °C | 17.3 °C | 93.22 mm |
| May | 9.1 °C | 22.6 °C | 106.43 mm |
| June | 14.1 °C | 27.3 °C | 100.08 mm |
| July | 16.6 °C | 29.8 °C | 92.2 mm |
| August | 15.6 °C | 28.8 °C | 89.41 mm |
| September | 11.6 °C | 24.9 °C | 99.31 mm |
| October | 5.3 °C | 18.4 °C | 88.65 mm |
| November | 0.1 °C | 11.6 °C | 75.95 mm |
| December | -3.8 °C | 5.5 °C | 82.55 mm |
| Annual | 4.9 °C | 17 °C | 1049.04 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |