Rankin, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 16.7 °C (high). Annual precipitation averages 1046 Millimeters. Rankin is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 3.1 °C | 81.03 mm |
| February | -4.9 °C | 4.6 °C | 61.72 mm |
| March | -1.2 °C | 9.7 °C | 84.84 mm |
| April | 4.6 °C | 17.2 °C | 85.6 mm |
| May | 10.4 °C | 22.6 °C | 97.54 mm |
| June | 15.3 °C | 26.9 °C | 111.25 mm |
| July | 17.6 °C | 29.1 °C | 108.97 mm |
| August | 16.9 °C | 28.3 °C | 93.98 mm |
| September | 13.1 °C | 24.7 °C | 89.41 mm |
| October | 6.7 °C | 17.9 °C | 78.49 mm |
| November | 1.3 °C | 11.2 °C | 75.18 mm |
| December | -2.7 °C | 5.4 °C | 77.98 mm |
| Annual | 6 °C | 16.7 °C | 1045.99 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |