Sandy Lake, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.3 °F (low) to 59.2 °F (high). Annual precipitation averages 45.4 Inches. Sandy Lake 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 | 17.3 °F | 33.9 °F | 3.3 in. |
| February | 17.6 °F | 36.7 °F | 2.52 in. |
| March | 25.1 °F | 45.6 °F | 3.3 in. |
| April | 35.5 °F | 59.2 °F | 4.08 in. |
| May | 46.0 °F | 70.1 °F | 3.97 in. |
| June | 55.1 °F | 78.0 °F | 4.9 in. |
| July | 59.1 °F | 81.9 °F | 4.82 in. |
| August | 57.6 °F | 80.5 °F | 3.95 in. |
| September | 50.9 °F | 74.2 °F | 4.15 in. |
| October | 40.3 °F | 62.0 °F | 3.58 in. |
| November | 31.4 °F | 49.4 °F | 3.36 in. |
| December | 23.5 °F | 38.5 °F | 3.43 in. |
| Annual | 38.3 °F | 59.2 °F | 45.36 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |