Delhi, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.5 °F (low) to 56.6 °F (high). Annual precipitation averages 48 Inches. Delhi 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 | 12.3 °F | 31.5 °F | 3.38 in. |
| February | 13.6 °F | 34.1 °F | 2.71 in. |
| March | 20.8 °F | 42.0 °F | 3.61 in. |
| April | 31.8 °F | 55.9 °F | 3.98 in. |
| May | 41.9 °F | 67.6 °F | 4.12 in. |
| June | 51.4 °F | 75.5 °F | 4.69 in. |
| July | 55.9 °F | 79.8 °F | 4.79 in. |
| August | 54.7 °F | 78.8 °F | 4.79 in. |
| September | 47.4 °F | 71.9 °F | 4.45 in. |
| October | 36.8 °F | 59.5 °F | 4.35 in. |
| November | 28.1 °F | 46.8 °F | 3.46 in. |
| December | 19.8 °F | 36.2 °F | 3.62 in. |
| Annual | 34.5 °F | 56.6 °F | 47.95 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |