Alba, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 13.9 °C (high). Annual precipitation averages 998 Millimeters. Alba is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.8 °C | 0.1 °C | 68.07 mm |
| February | -9.4 °C | 1.4 °C | 51.31 mm |
| March | -5.4 °C | 6.1 °C | 74.17 mm |
| April | 0.5 °C | 13.4 °C | 85.6 mm |
| May | 6.6 °C | 19.9 °C | 87.88 mm |
| June | 11.6 °C | 24.2 °C | 100.33 mm |
| July | 13.9 °C | 26.7 °C | 94.23 mm |
| August | 13.2 °C | 25.9 °C | 91.19 mm |
| September | 9.1 °C | 22.2 °C | 107.95 mm |
| October | 3.4 °C | 15.3 °C | 94.74 mm |
| November | -1.6 °C | 8.6 °C | 73.41 mm |
| December | -5.9 °C | 2.7 °C | 69.09 mm |
| Annual | 2.2 °C | 13.9 °C | 997.97 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |