Arlington Heights, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.8 °F (low) to 61.6 °F (high). Annual precipitation averages 52.8 Inches. Arlington Heights 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 | 18.6 °F | 36.6 °F | 3.76 in. |
| February | 19.9 °F | 39.7 °F | 3.03 in. |
| March | 27.0 °F | 48.1 °F | 3.94 in. |
| April | 37.3 °F | 61.5 °F | 4.27 in. |
| May | 47.6 °F | 71.6 °F | 4.37 in. |
| June | 56.5 °F | 79.8 °F | 4.92 in. |
| July | 61.5 °F | 84.5 °F | 4.69 in. |
| August | 59.6 °F | 82.6 °F | 4.8 in. |
| September | 52.5 °F | 76.1 °F | 5.3 in. |
| October | 40.9 °F | 63.8 °F | 5.41 in. |
| November | 31.4 °F | 52.8 °F | 3.79 in. |
| December | 24.3 °F | 42.0 °F | 4.49 in. |
| Annual | 39.8 °F | 61.6 °F | 52.77 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |