Conshohocken, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.9 °C (low) to 18 °C (high). Annual precipitation averages 1220.2 Millimeters. 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.7 °C | 4.8 °C | 88.14 mm |
| February | -2.9 °C | 6.3 °C | 72.64 mm |
| March | 0.8 °C | 10.9 °C | 108.97 mm |
| April | 6.4 °C | 17.6 °C | 93.98 mm |
| May | 11.8 °C | 22.9 °C | 103.63 mm |
| June | 17.2 °C | 27.9 °C | 111.25 mm |
| July | 20.1 °C | 30.5 °C | 113.03 mm |
| August | 19.2 °C | 29.5 °C | 123.44 mm |
| September | 15.2 °C | 25.9 °C | 112.01 mm |
| October | 8.7 °C | 19.1 °C | 100.08 mm |
| November | 3.1 °C | 13 °C | 81.79 mm |
| December | -0.8 °C | 7.5 °C | 111.25 mm |
| Annual | 7.9 °C | 18 °C | 1220.21 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |