Sweden Valley, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.4 °F (low) to 56 °F (high). Annual precipitation averages 46 Inches. Sweden Valley 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.7 °F | 30.7 °F | 3.26 in. |
| February | 14.7 °F | 33.4 °F | 2.36 in. |
| March | 21.0 °F | 42.1 °F | 3.5 in. |
| April | 31.4 °F | 56.0 °F | 3.83 in. |
| May | 42.1 °F | 67.8 °F | 3.97 in. |
| June | 50.3 °F | 74.9 °F | 4.42 in. |
| July | 54.6 °F | 78.7 °F | 4.77 in. |
| August | 53.4 °F | 77.1 °F | 4.3 in. |
| September | 46.7 °F | 70.9 °F | 4.36 in. |
| October | 36.5 °F | 58.8 °F | 4.25 in. |
| November | 28.1 °F | 46.2 °F | 3.58 in. |
| December | 20.0 °F | 35.1 °F | 3.44 in. |
| Annual | 34.4 °F | 56 °F | 46.04 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |