Rheems, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 63.1 °F (high). Annual precipitation averages 45.3 Inches. Rheems is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.2 °F | 38.5 °F | 3.13 in. |
| February | 23.2 °F | 41.3 °F | 2.55 in. |
| March | 30.8 °F | 50.2 °F | 3.77 in. |
| April | 40.9 °F | 63.3 °F | 3.52 in. |
| May | 51.1 °F | 73.0 °F | 3.97 in. |
| June | 60.7 °F | 81.4 °F | 4.27 in. |
| July | 65.1 °F | 86.1 °F | 4.48 in. |
| August | 63.3 °F | 84.2 °F | 3.93 in. |
| September | 56.2 °F | 77.3 °F | 4.73 in. |
| October | 44.6 °F | 65.4 °F | 4.23 in. |
| November | 34.7 °F | 53.7 °F | 3.17 in. |
| December | 27.3 °F | 43.1 °F | 3.52 in. |
| Annual | 43.3 °F | 63.1 °F | 45.27 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |