Mariaville Lake, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.9 °F (low) to 55.7 °F (high). Annual precipitation averages 45.5 Inches. Mariaville Lake is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.5 °F | 29.6 °F | 2.85 in. |
| February | 12.4 °F | 32.1 °F | 2.83 in. |
| March | 19.8 °F | 40.2 °F | 3.63 in. |
| April | 32.1 °F | 54.7 °F | 3.62 in. |
| May | 44.1 °F | 67.0 °F | 3.73 in. |
| June | 52.9 °F | 75.0 °F | 4.52 in. |
| July | 57.4 °F | 79.7 °F | 4.97 in. |
| August | 55.7 °F | 78.3 °F | 4.66 in. |
| September | 48.3 °F | 71.4 °F | 3.68 in. |
| October | 37.2 °F | 58.5 °F | 4.48 in. |
| November | 28.1 °F | 46.1 °F | 2.98 in. |
| December | 19.0 °F | 35.3 °F | 3.56 in. |
| Annual | 34.9 °F | 55.7 °F | 45.51 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |