Fort Washington, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.7 °F (low) to 64.1 °F (high). Annual precipitation averages 48 Inches. Fort Washington 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 | 24.6 °F | 40.3 °F | 3.38 in. |
| February | 26.1 °F | 43.1 °F | 2.78 in. |
| March | 32.9 °F | 51.2 °F | 4.13 in. |
| April | 43.0 °F | 63.3 °F | 3.73 in. |
| May | 52.9 °F | 72.9 °F | 4.09 in. |
| June | 62.4 °F | 81.9 °F | 4.39 in. |
| July | 67.8 °F | 86.5 °F | 4.66 in. |
| August | 66.1 °F | 84.8 °F | 4.8 in. |
| September | 58.9 °F | 78.2 °F | 4.39 in. |
| October | 47.0 °F | 66.3 °F | 4.02 in. |
| November | 37.1 °F | 55.2 °F | 3.24 in. |
| December | 29.8 °F | 45.2 °F | 4.35 in. |
| Annual | 45.7 °F | 64.1 °F | 47.96 in. |
| 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 : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |