Ulysses, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36 °F (low) to 55.4 °F (high). Annual precipitation averages 42.6 Inches. Ulysses is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.1 °F | 30.0 °F | 3.29 in. |
| February | 16.1 °F | 32.9 °F | 2.14 in. |
| March | 22.7 °F | 41.5 °F | 3.13 in. |
| April | 33.1 °F | 55.5 °F | 3.49 in. |
| May | 44.0 °F | 67.0 °F | 3.68 in. |
| June | 52.2 °F | 74.2 °F | 4.13 in. |
| July | 56.2 °F | 78.0 °F | 4.3 in. |
| August | 54.8 °F | 76.6 °F | 4.04 in. |
| September | 48.3 °F | 70.2 °F | 4.14 in. |
| October | 38.2 °F | 58.6 °F | 3.89 in. |
| November | 29.8 °F | 45.5 °F | 3.2 in. |
| December | 21.0 °F | 34.5 °F | 3.2 in. |
| Annual | 36 °F | 55.4 °F | 42.63 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| 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 |