Union Deposit, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 62.6 °F (high). Annual precipitation averages 45.5 Inches. Union Deposit is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.0 °F | 37.8 °F | 3.17 in. |
| February | 23.1 °F | 40.5 °F | 2.55 in. |
| March | 30.9 °F | 49.5 °F | 3.76 in. |
| April | 41.2 °F | 62.3 °F | 3.62 in. |
| May | 51.4 °F | 72.3 °F | 3.99 in. |
| June | 60.7 °F | 81.1 °F | 4.29 in. |
| July | 65.0 °F | 85.9 °F | 4.5 in. |
| August | 63.3 °F | 83.9 °F | 3.98 in. |
| September | 56.1 °F | 77.0 °F | 4.73 in. |
| October | 44.5 °F | 64.7 °F | 4.13 in. |
| November | 34.7 °F | 53.2 °F | 3.23 in. |
| December | 27.2 °F | 42.5 °F | 3.5 in. |
| Annual | 43.3 °F | 62.6 °F | 45.45 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |