Treasure Lake, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.2 °C (low) to 13.9 °C (high). Annual precipitation averages 1159.5 Millimeters. Treasure Lake is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | -0.1 °C | 87.88 mm |
| February | -8.1 °C | 1.6 °C | 66.55 mm |
| March | -4.4 °C | 6.4 °C | 87.88 mm |
| April | 2 °C | 14.5 °C | 99.57 mm |
| May | 7.8 °C | 20.4 °C | 104.39 mm |
| June | 12.4 °C | 24.2 °C | 119.63 mm |
| July | 14.7 °C | 26.4 °C | 112.01 mm |
| August | 13.9 °C | 25.6 °C | 105.41 mm |
| September | 10.3 °C | 21.9 °C | 103.63 mm |
| October | 4.3 °C | 15.3 °C | 91.44 mm |
| November | -1 °C | 8.4 °C | 90.42 mm |
| December | -5.2 °C | 2.3 °C | 90.68 mm |
| Annual | 3.2 °C | 13.9 °C | 1159.49 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |