North Valley Stream, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.7 °F (low) to 62.7 °F (high). Annual precipitation averages 48.7 Inches. North 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 | 26.4 °F | 40.2 °F | 3.78 in. |
| February | 27.5 °F | 42.3 °F | 2.99 in. |
| March | 33.5 °F | 49.1 °F | 4.47 in. |
| April | 42.8 °F | 60.2 °F | 4.03 in. |
| May | 52.2 °F | 69.8 °F | 3.96 in. |
| June | 61.9 °F | 79.1 °F | 4.39 in. |
| July | 68.1 °F | 84.8 °F | 4.27 in. |
| August | 67.1 °F | 83.4 °F | 4.48 in. |
| September | 60.3 °F | 77.0 °F | 3.99 in. |
| October | 49.1 °F | 65.7 °F | 4.67 in. |
| November | 39.7 °F | 55.0 °F | 3.37 in. |
| December | 32.3 °F | 45.5 °F | 4.33 in. |
| Annual | 46.7 °F | 62.7 °F | 48.73 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 |