Arlington Heights, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.3 °C (low) to 16.5 °C (high). Annual precipitation averages 1340.4 Millimeters. 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 | -7.4 °C | 2.6 °C | 95.5 mm |
| February | -6.7 °C | 4.3 °C | 76.96 mm |
| March | -2.8 °C | 8.9 °C | 100.08 mm |
| April | 2.9 °C | 16.4 °C | 108.46 mm |
| May | 8.7 °C | 22 °C | 111 mm |
| June | 13.6 °C | 26.6 °C | 124.97 mm |
| July | 16.4 °C | 29.2 °C | 119.13 mm |
| August | 15.3 °C | 28.1 °C | 121.92 mm |
| September | 11.4 °C | 24.5 °C | 134.62 mm |
| October | 4.9 °C | 17.7 °C | 137.41 mm |
| November | -0.3 °C | 11.6 °C | 96.27 mm |
| December | -4.3 °C | 5.6 °C | 114.05 mm |
| Annual | 4.3 °C | 16.5 °C | 1340.37 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |