Middletown, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.7 °F (low) to 60 °F (high). Annual precipitation averages 44.9 Inches. Middletown is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.4 °F | 34.7 °F | 2.9 in. |
| February | 18.8 °F | 37.9 °F | 2.34 in. |
| March | 26.4 °F | 46.2 °F | 3.27 in. |
| April | 37.3 °F | 59.7 °F | 3.87 in. |
| May | 47.8 °F | 70.4 °F | 3.6 in. |
| June | 57.2 °F | 78.8 °F | 4.68 in. |
| July | 61.7 °F | 83.5 °F | 4.08 in. |
| August | 60.1 °F | 81.5 °F | 4.4 in. |
| September | 52.9 °F | 74.6 °F | 4.36 in. |
| October | 41.5 °F | 62.5 °F | 4.27 in. |
| November | 31.9 °F | 50.7 °F | 3.39 in. |
| December | 23.7 °F | 39.6 °F | 3.7 in. |
| Annual | 39.7 °F | 60 °F | 44.86 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |