Rew, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 12.6 °C (high). Annual precipitation averages 1154.4 Millimeters. Rew 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | -1.3 °C | 86.11 mm |
| February | -9.1 °C | 0.3 °C | 65.79 mm |
| March | -5.4 °C | 5 °C | 84.84 mm |
| April | 0.6 °C | 12.4 °C | 96.52 mm |
| May | 6.6 °C | 18.9 °C | 102.11 mm |
| June | 10.9 °C | 23.1 °C | 115.32 mm |
| July | 13.2 °C | 25.1 °C | 124.71 mm |
| August | 12.4 °C | 24.1 °C | 108.2 mm |
| September | 8.9 °C | 20.7 °C | 95.25 mm |
| October | 3.3 °C | 14.1 °C | 98.3 mm |
| November | -1.4 °C | 7.1 °C | 89.66 mm |
| December | -6.3 °C | 1.3 °C | 87.63 mm |
| Annual | 2 °C | 12.6 °C | 1154.44 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°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 |