Lewiston, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 58.2 °F (high). Annual precipitation averages 35.8 Inches. Lewiston 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.1 °F | 33.2 °F | 2.82 in. |
| February | 20.5 °F | 34.6 °F | 2.35 in. |
| March | 26.9 °F | 42.7 °F | 2.65 in. |
| April | 36.5 °F | 55.9 °F | 3.18 in. |
| May | 47.4 °F | 68.7 °F | 3.02 in. |
| June | 57.6 °F | 77.8 °F | 3.31 in. |
| July | 63.0 °F | 82.1 °F | 2.81 in. |
| August | 61.8 °F | 80.8 °F | 3.04 in. |
| September | 55.2 °F | 74.1 °F | 3.43 in. |
| October | 44.5 °F | 61.1 °F | 3.47 in. |
| November | 35.4 °F | 49.0 °F | 3.04 in. |
| December | 26.8 °F | 38.7 °F | 2.64 in. |
| Annual | 41.3 °F | 58.2 °F | 35.76 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |