Rockville Centre, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.9 °F (low) to 62.1 °F (high). Annual precipitation averages 49 Inches. Rockville Centre is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.4 °F | 39.8 °F | 3.79 in. |
| February | 27.5 °F | 41.8 °F | 2.96 in. |
| March | 33.5 °F | 48.4 °F | 4.55 in. |
| April | 42.8 °F | 59.5 °F | 4.08 in. |
| May | 52.3 °F | 69.2 °F | 4.01 in. |
| June | 62.1 °F | 78.2 °F | 4.46 in. |
| July | 68.1 °F | 84.1 °F | 4.27 in. |
| August | 67.2 °F | 82.9 °F | 4.43 in. |
| September | 60.6 °F | 76.6 °F | 3.99 in. |
| October | 49.9 °F | 65.2 °F | 4.75 in. |
| November | 40.1 °F | 54.5 °F | 3.43 in. |
| December | 32.4 °F | 45.1 °F | 4.26 in. |
| Annual | 46.9 °F | 62.1 °F | 48.98 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |