Malta, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 14.6 °C (high). Annual precipitation averages 1155.4 Millimeters. Malta is located in USDA Plant Hardiness Zone 5b. 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 | -9.6 °C | -0.3 °C | 81.79 mm |
| February | -8.9 °C | 1.4 °C | 70.1 mm |
| March | -4.2 °C | 6.4 °C | 87.63 mm |
| April | 2.2 °C | 14.6 °C | 95.5 mm |
| May | 8.6 °C | 21.3 °C | 93.47 mm |
| June | 13.7 °C | 25.7 °C | 118.11 mm |
| July | 16.2 °C | 28.3 °C | 123.44 mm |
| August | 15.4 °C | 27.1 °C | 104.14 mm |
| September | 11.2 °C | 23.2 °C | 95.76 mm |
| October | 4.9 °C | 16.1 °C | 107.19 mm |
| November | -0.6 °C | 8.9 °C | 84.58 mm |
| December | -5.6 °C | 2.6 °C | 93.73 mm |
| Annual | 3.6 °C | 14.6 °C | 1155.44 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |