Norvelt, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.4 °F (low) to 61.8 °F (high). Annual precipitation averages 45.1 Inches. Norvelt is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.4 °F | 37.7 °F | 3.33 in. |
| February | 21.1 °F | 40.4 °F | 2.71 in. |
| March | 28.3 °F | 49.5 °F | 3.56 in. |
| April | 37.9 °F | 62.4 °F | 3.82 in. |
| May | 48.3 °F | 71.9 °F | 4.12 in. |
| June | 57.1 °F | 79.6 °F | 5.05 in. |
| July | 61.3 °F | 83.2 °F | 4.82 in. |
| August | 59.7 °F | 82.5 °F | 3.98 in. |
| September | 52.4 °F | 76.2 °F | 3.84 in. |
| October | 41.2 °F | 64.2 °F | 3.32 in. |
| November | 31.9 °F | 52.1 °F | 3.35 in. |
| December | 25.4 °F | 41.9 °F | 3.22 in. |
| Annual | 40.4 °F | 61.8 °F | 45.12 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |