Phoenixville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.6 °F (low) to 64.4 °F (high). Annual precipitation averages 46.8 Inches. Phoenixville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.6 °F | 40.2 °F | 3.34 in. |
| February | 23.9 °F | 42.8 °F | 2.91 in. |
| March | 30.8 °F | 51.4 °F | 3.92 in. |
| April | 41.0 °F | 63.9 °F | 3.69 in. |
| May | 50.9 °F | 73.6 °F | 3.75 in. |
| June | 60.8 °F | 82.5 °F | 4.39 in. |
| July | 66.1 °F | 86.9 °F | 4.68 in. |
| August | 64.3 °F | 85.4 °F | 4.15 in. |
| September | 56.7 °F | 78.9 °F | 4.67 in. |
| October | 44.4 °F | 66.5 °F | 3.97 in. |
| November | 34.4 °F | 55.3 °F | 3.15 in. |
| December | 27.5 °F | 45.0 °F | 4.16 in. |
| Annual | 43.6 °F | 64.4 °F | 46.78 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |