Eau Claire, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.8 °F (low) to 58.6 °F (high). Annual precipitation averages 44.9 Inches. Eau Claire is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.4 °F | 33.2 °F | 3.29 in. |
| February | 18.5 °F | 36.2 °F | 2.55 in. |
| March | 25.3 °F | 45.4 °F | 3.36 in. |
| April | 36.4 °F | 59.1 °F | 3.92 in. |
| May | 47.4 °F | 69.7 °F | 3.85 in. |
| June | 55.7 °F | 77.4 °F | 5.03 in. |
| July | 59.5 °F | 81.1 °F | 4.71 in. |
| August | 58.0 °F | 80.1 °F | 3.95 in. |
| September | 51.3 °F | 73.6 °F | 4.13 in. |
| October | 40.6 °F | 61.2 °F | 3.36 in. |
| November | 31.6 °F | 48.6 °F | 3.35 in. |
| December | 23.5 °F | 37.7 °F | 3.38 in. |
| Annual | 38.8 °F | 58.6 °F | 44.88 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |