Earlville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 14 °C (high). Annual precipitation averages 1097.8 Millimeters. Earlville 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 | -10.8 °C | -0.3 °C | 72.9 mm |
| February | -10.1 °C | 1.2 °C | 64.26 mm |
| March | -6.2 °C | 5.7 °C | 81.53 mm |
| April | 0.4 °C | 13.3 °C | 84.84 mm |
| May | 6.6 °C | 20.4 °C | 92.46 mm |
| June | 11.7 °C | 25.1 °C | 116.59 mm |
| July | 14.2 °C | 27.3 °C | 111 mm |
| August | 13.4 °C | 26.6 °C | 109.47 mm |
| September | 9.3 °C | 22.8 °C | 97.79 mm |
| October | 3.6 °C | 15.6 °C | 98.55 mm |
| November | -1.7 °C | 8.4 °C | 80.01 mm |
| December | -6.3 °C | 2.4 °C | 88.39 mm |
| Annual | 2 °C | 14 °C | 1097.79 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 |