Telford, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.6 °F (low) to 63 °F (high). Annual precipitation averages 48.6 Inches. Telford 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.5 °F | 38.7 °F | 3.36 in. |
| February | 22.9 °F | 41.5 °F | 2.92 in. |
| March | 30.1 °F | 50.0 °F | 3.94 in. |
| April | 40.3 °F | 62.5 °F | 3.9 in. |
| May | 50.0 °F | 72.1 °F | 4.25 in. |
| June | 59.3 °F | 81.0 °F | 4.5 in. |
| July | 64.2 °F | 85.8 °F | 4.69 in. |
| August | 62.6 °F | 83.9 °F | 4.32 in. |
| September | 55.4 °F | 77.4 °F | 4.62 in. |
| October | 43.6 °F | 65.1 °F | 4.39 in. |
| November | 33.8 °F | 53.9 °F | 3.29 in. |
| December | 26.9 °F | 43.7 °F | 4.45 in. |
| Annual | 42.6 °F | 63 °F | 48.63 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |