Valley Stream, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47 °F (low) to 62.5 °F (high). Annual precipitation averages 48.5 Inches. Valley Stream is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.5 °F | 40.1 °F | 3.77 in. |
| February | 27.6 °F | 42.2 °F | 2.96 in. |
| March | 33.6 °F | 48.9 °F | 4.5 in. |
| April | 43.0 °F | 59.9 °F | 4.04 in. |
| May | 52.3 °F | 69.5 °F | 3.94 in. |
| June | 62.2 °F | 78.7 °F | 4.35 in. |
| July | 68.3 °F | 84.5 °F | 4.2 in. |
| August | 67.4 °F | 83.0 °F | 4.44 in. |
| September | 60.6 °F | 76.7 °F | 3.91 in. |
| October | 49.4 °F | 65.5 °F | 4.67 in. |
| November | 40.0 °F | 54.9 °F | 3.39 in. |
| December | 32.5 °F | 45.5 °F | 4.31 in. |
| Annual | 47 °F | 62.5 °F | 48.48 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |