Calcium, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.4 °C (low) to 12.8 °C (high). Annual precipitation averages 1099.8 Millimeters. Calcium is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.4 °C | -2 °C | 94.49 mm |
| February | -11.8 °C | -1.1 °C | 66.8 mm |
| March | -6.3 °C | 3.8 °C | 69.85 mm |
| April | 0.9 °C | 11.9 °C | 86.11 mm |
| May | 7.7 °C | 19.1 °C | 88.9 mm |
| June | 13 °C | 23.8 °C | 91.19 mm |
| July | 15.9 °C | 26.4 °C | 85.6 mm |
| August | 15.1 °C | 25.8 °C | 94.23 mm |
| September | 10.6 °C | 21.9 °C | 94.74 mm |
| October | 4.3 °C | 14.7 °C | 125.98 mm |
| November | -1.4 °C | 7.8 °C | 103.89 mm |
| December | -7.3 °C | 1.3 °C | 98.04 mm |
| Annual | 2.4 °C | 12.8 °C | 1099.82 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |