Tullytown, Pennsylvania has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.6 °F (low) to 64.7 °F (high). Annual precipitation averages 47.3 Inches. Tullytown is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.0 °F | 41.1 °F | 3.53 in. |
| February | 26.1 °F | 43.9 °F | 2.71 in. |
| March | 33.0 °F | 51.6 °F | 4.35 in. |
| April | 42.9 °F | 63.9 °F | 3.52 in. |
| May | 52.6 °F | 73.3 °F | 3.96 in. |
| June | 61.9 °F | 82.4 °F | 4.3 in. |
| July | 67.4 °F | 87.0 °F | 4.85 in. |
| August | 65.9 °F | 85.4 °F | 4.75 in. |
| September | 58.9 °F | 79.0 °F | 3.94 in. |
| October | 47.1 °F | 67.0 °F | 3.87 in. |
| November | 37.0 °F | 56.1 °F | 3.2 in. |
| December | 29.8 °F | 46.0 °F | 4.3 in. |
| Annual | 45.6 °F | 64.7 °F | 47.28 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |