Hauppauge, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45 °F (low) to 61.5 °F (high). Annual precipitation averages 50.9 Inches. Hauppauge is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.3 °F | 39.5 °F | 3.96 in. |
| February | 25.3 °F | 41.4 °F | 3.56 in. |
| March | 31.6 °F | 48.1 °F | 5.05 in. |
| April | 40.8 °F | 59.4 °F | 4.4 in. |
| May | 50.5 °F | 69.3 °F | 3.93 in. |
| June | 60.5 °F | 78.0 °F | 4.4 in. |
| July | 66.8 °F | 83.3 °F | 3.42 in. |
| August | 65.6 °F | 81.7 °F | 4.21 in. |
| September | 58.9 °F | 75.1 °F | 4.07 in. |
| October | 47.5 °F | 64.0 °F | 5.02 in. |
| November | 37.6 °F | 53.9 °F | 3.8 in. |
| December | 30.1 °F | 44.8 °F | 5.1 in. |
| Annual | 45 °F | 61.5 °F | 50.92 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |