Cassandra, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.8 °F (low) to 58.1 °F (high). Annual precipitation averages 45.6 Inches. Cassandra is located in USDA Plant Hardiness Zone 6a. 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 | 17.5 °F | 33.7 °F | 3.32 in. |
| February | 18.3 °F | 36.6 °F | 2.88 in. |
| March | 25.1 °F | 45.1 °F | 3.7 in. |
| April | 35.4 °F | 58.9 °F | 3.88 in. |
| May | 45.8 °F | 68.5 °F | 4.35 in. |
| June | 54.3 °F | 76.4 °F | 4.26 in. |
| July | 58.3 °F | 80.1 °F | 4.31 in. |
| August | 56.8 °F | 78.8 °F | 4.15 in. |
| September | 50.2 °F | 72.4 °F | 4.21 in. |
| October | 39.4 °F | 60.7 °F | 3.55 in. |
| November | 29.6 °F | 48.4 °F | 3.21 in. |
| December | 22.7 °F | 37.9 °F | 3.74 in. |
| Annual | 37.8 °F | 58.1 °F | 45.56 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |