Fillmore, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.4 °F (low) to 56.6 °F (high). Annual precipitation averages 38.5 Inches. Fillmore 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 | 14.4 °F | 31.4 °F | 2.58 in. |
| February | 14.3 °F | 33.7 °F | 1.95 in. |
| March | 21.2 °F | 41.8 °F | 2.54 in. |
| April | 32.0 °F | 55.2 °F | 3.14 in. |
| May | 42.9 °F | 67.9 °F | 3.32 in. |
| June | 52.1 °F | 76.0 °F | 3.92 in. |
| July | 56.4 °F | 79.9 °F | 3.98 in. |
| August | 54.7 °F | 78.6 °F | 3.74 in. |
| September | 48.3 °F | 72.2 °F | 3.7 in. |
| October | 38.2 °F | 59.5 °F | 3.73 in. |
| November | 29.3 °F | 47.0 °F | 2.96 in. |
| December | 21.1 °F | 36.5 °F | 2.98 in. |
| Annual | 35.4 °F | 56.6 °F | 38.54 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |