Monument, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.5 °F (low) to 60 °F (high). Annual precipitation averages 43.6 Inches. Monument 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 | 17.7 °F | 34.5 °F | 3.08 in. |
| February | 18.6 °F | 37.7 °F | 2.43 in. |
| March | 25.7 °F | 46.8 °F | 3.39 in. |
| April | 35.8 °F | 60.5 °F | 3.71 in. |
| May | 46.4 °F | 71.5 °F | 4.04 in. |
| June | 55.3 °F | 79.0 °F | 4.11 in. |
| July | 59.5 °F | 83.3 °F | 4.17 in. |
| August | 58.0 °F | 81.4 °F | 4.02 in. |
| September | 50.8 °F | 74.5 °F | 4.33 in. |
| October | 39.7 °F | 62.4 °F | 3.83 in. |
| November | 30.4 °F | 50.0 °F | 3.21 in. |
| December | 23.5 °F | 38.9 °F | 3.24 in. |
| Annual | 38.5 °F | 60 °F | 43.56 in. |
| 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |