Hamburg, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.1 °F (low) to 62.3 °F (high). Annual precipitation averages 49.9 Inches. Hamburg 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 | 20.1 °F | 37.6 °F | 3.63 in. |
| February | 21.3 °F | 40.3 °F | 2.72 in. |
| March | 28.8 °F | 48.8 °F | 3.84 in. |
| April | 38.8 °F | 62.1 °F | 3.92 in. |
| May | 48.8 °F | 72.1 °F | 3.96 in. |
| June | 58.0 °F | 80.7 °F | 5.11 in. |
| July | 62.7 °F | 85.3 °F | 5.12 in. |
| August | 60.8 °F | 83.6 °F | 4.6 in. |
| September | 53.5 °F | 76.7 °F | 5.17 in. |
| October | 41.8 °F | 64.9 °F | 4.41 in. |
| November | 32.6 °F | 52.9 °F | 3.45 in. |
| December | 25.4 °F | 42.4 °F | 3.92 in. |
| Annual | 41.1 °F | 62.3 °F | 49.85 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 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |