West Conshohocken, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.7 °C (low) to 18 °C (high). Annual precipitation averages 1221.7 Millimeters. West Conshohocken is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4 °C | 4.8 °C | 88.39 mm |
| February | -3.3 °C | 6.3 °C | 72.9 mm |
| March | 0.6 °C | 10.9 °C | 109.47 mm |
| April | 6.2 °C | 17.7 °C | 93.98 mm |
| May | 11.6 °C | 23 °C | 103.63 mm |
| June | 17 °C | 28 °C | 111.51 mm |
| July | 19.9 °C | 30.5 °C | 113.03 mm |
| August | 19 °C | 29.6 °C | 123.44 mm |
| September | 15 °C | 26 °C | 112.27 mm |
| October | 8.4 °C | 19.2 °C | 100.08 mm |
| November | 2.9 °C | 13 °C | 81.53 mm |
| December | -1.1 °C | 7.5 °C | 111.51 mm |
| Annual | 7.7 °C | 18 °C | 1221.74 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |