Nicholson, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.5 °F (low) to 59.1 °F (high). Annual precipitation averages 43.7 Inches. Nicholson is located in USDA Plant Hardiness Zone 6a. 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 | 16.8 °F | 33.6 °F | 3.03 in. |
| February | 17.4 °F | 36.0 °F | 2.36 in. |
| March | 25.1 °F | 44.9 °F | 3.24 in. |
| April | 35.3 °F | 58.5 °F | 3.69 in. |
| May | 46.5 °F | 70.1 °F | 3.84 in. |
| June | 55.6 °F | 78.3 °F | 4.35 in. |
| July | 60.0 °F | 82.8 °F | 4.56 in. |
| August | 58.6 °F | 81.0 °F | 4.1 in. |
| September | 51.5 °F | 74.0 °F | 4.17 in. |
| October | 40.3 °F | 61.8 °F | 4.12 in. |
| November | 31.2 °F | 49.3 °F | 3.01 in. |
| December | 23.5 °F | 38.9 °F | 3.25 in. |
| Annual | 38.5 °F | 59.1 °F | 43.72 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |