Cairo, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.1 °F (low) to 59.7 °F (high). Annual precipitation averages 42 Inches. Cairo is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.4 °F | 34.0 °F | 2.82 in. |
| February | 18.2 °F | 37.0 °F | 2.42 in. |
| March | 25.8 °F | 45.6 °F | 3.18 in. |
| April | 36.7 °F | 59.7 °F | 3.44 in. |
| May | 47.2 °F | 71.1 °F | 3.26 in. |
| June | 56.3 °F | 79.1 °F | 4.07 in. |
| July | 61.2 °F | 83.7 °F | 3.51 in. |
| August | 59.6 °F | 81.6 °F | 3.89 in. |
| September | 52.0 °F | 74.6 °F | 3.91 in. |
| October | 40.9 °F | 62.0 °F | 4.85 in. |
| November | 31.5 °F | 49.7 °F | 2.97 in. |
| December | 23.3 °F | 38.7 °F | 3.65 in. |
| Annual | 39.1 °F | 59.7 °F | 41.97 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |