Riverside, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41 °F (low) to 61.4 °F (high). Annual precipitation averages 43.8 Inches. Riverside is located in USDA Plant Hardiness Zone 6b. 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 | 19.5 °F | 36.5 °F | 3.11 in. |
| February | 21.0 °F | 39.5 °F | 3.03 in. |
| March | 27.9 °F | 48.1 °F | 3.68 in. |
| April | 38.0 °F | 62.5 °F | 3.99 in. |
| May | 47.9 °F | 72.2 °F | 4.32 in. |
| June | 56.2 °F | 79.8 °F | 4.48 in. |
| July | 60.1 °F | 83.7 °F | 4.35 in. |
| August | 58.3 °F | 82.3 °F | 4.35 in. |
| September | 51.5 °F | 75.9 °F | 4.04 in. |
| October | 40.0 °F | 64.1 °F | 3.42 in. |
| November | 31.8 °F | 51.6 °F | 3.23 in. |
| December | 24.7 °F | 41.0 °F | 3.62 in. |
| Annual | 39.7 °F | 61.4 °F | 45.62 in. |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.8 °F | 35.8 °F | 3.27 in. |
| February | 21.0 °F | 38.8 °F | 2.41 in. |
| March | 28.4 °F | 48.2 °F | 3.5 in. |
| April | 38.3 °F | 61.9 °F | 3.97 in. |
| May | 49.1 °F | 72.2 °F | 3.83 in. |
| June | 58.4 °F | 80.3 °F | 4.17 in. |
| July | 62.5 °F | 84.7 °F | 4.13 in. |
| August | 61.0 °F | 82.8 °F | 4.01 in. |
| September | 53.5 °F | 76.1 °F | 4.32 in. |
| October | 42.3 °F | 63.7 °F | 3.92 in. |
| November | 32.5 °F | 51.4 °F | 3.08 in. |
| December | 25.4 °F | 40.4 °F | 3.2 in. |
| Annual | 41 °F | 61.4 °F | 43.81 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |