Bradford, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 57 °F (high). Annual precipitation averages 45.6 Inches. Bradford is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.1 °F | 31.7 °F | 3.2 in. |
| February | 14.5 °F | 34.1 °F | 2.6 in. |
| March | 21.4 °F | 42.9 °F | 3.08 in. |
| April | 32.0 °F | 56.4 °F | 3.87 in. |
| May | 42.6 °F | 68.7 °F | 4.11 in. |
| June | 51.5 °F | 76.4 °F | 4.43 in. |
| July | 55.7 °F | 80.0 °F | 4.79 in. |
| August | 54.8 °F | 78.5 °F | 4.34 in. |
| September | 48.2 °F | 72.0 °F | 4.0 in. |
| October | 37.5 °F | 59.8 °F | 4.09 in. |
| November | 28.9 °F | 47.0 °F | 3.52 in. |
| December | 21.3 °F | 36.4 °F | 3.6 in. |
| Annual | 35.2 °F | 57 °F | 45.63 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |