Garrett, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.4 °F (low) to 58.4 °F (high). Annual precipitation averages 44.1 Inches. Garrett 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 | 16.2 °F | 34.2 °F | 3.31 in. |
| February | 17.3 °F | 37.3 °F | 2.91 in. |
| March | 24.0 °F | 46.0 °F | 3.71 in. |
| April | 34.4 °F | 59.2 °F | 3.85 in. |
| May | 44.5 °F | 68.6 °F | 4.72 in. |
| June | 52.8 °F | 76.2 °F | 4.58 in. |
| July | 56.7 °F | 80.0 °F | 4.0 in. |
| August | 55.1 °F | 78.7 °F | 3.75 in. |
| September | 47.9 °F | 72.6 °F | 3.67 in. |
| October | 37.5 °F | 61.0 °F | 3.23 in. |
| November | 28.4 °F | 48.8 °F | 2.94 in. |
| December | 21.8 °F | 38.5 °F | 3.43 in. |
| Annual | 36.4 °F | 58.4 °F | 44.1 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |