Gray, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.1 °F (low) to 55.7 °F (high). Annual precipitation averages 50.2 Inches. Gray is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.2 °F | 29.9 °F | 3.46 in. |
| February | 12.4 °F | 33.0 °F | 3.64 in. |
| March | 22.0 °F | 41.3 °F | 3.92 in. |
| April | 33.0 °F | 53.7 °F | 4.4 in. |
| May | 43.7 °F | 65.2 °F | 3.65 in. |
| June | 54.0 °F | 74.0 °F | 4.78 in. |
| July | 59.9 °F | 79.9 °F | 3.83 in. |
| August | 58.4 °F | 79.0 °F | 3.66 in. |
| September | 50.7 °F | 71.5 °F | 3.93 in. |
| October | 39.2 °F | 58.6 °F | 5.76 in. |
| November | 29.3 °F | 46.4 °F | 4.45 in. |
| December | 18.9 °F | 35.9 °F | 4.71 in. |
| Annual | 36.1 °F | 55.7 °F | 50.19 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |