Delmont, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.6 °F (low) to 60.9 °F (high). Annual precipitation averages 44.6 Inches. Delmont 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.0 °F | 36.5 °F | 3.3 in. |
| February | 21.0 °F | 39.6 °F | 2.65 in. |
| March | 28.3 °F | 48.4 °F | 3.38 in. |
| April | 38.5 °F | 61.4 °F | 3.82 in. |
| May | 49.1 °F | 71.2 °F | 4.21 in. |
| June | 57.4 °F | 78.9 °F | 4.58 in. |
| July | 61.6 °F | 82.7 °F | 4.7 in. |
| August | 59.8 °F | 81.6 °F | 4.13 in. |
| September | 52.8 °F | 75.1 °F | 3.9 in. |
| October | 41.5 °F | 63.4 °F | 3.27 in. |
| November | 32.1 °F | 51.0 °F | 3.34 in. |
| December | 25.5 °F | 40.8 °F | 3.34 in. |
| Annual | 40.6 °F | 60.9 °F | 44.62 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 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 |