Somerset, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41 °F (low) to 61.2 °F (high). Annual precipitation averages 42.7 Inches. Somerset is located in USDA Plant Hardiness Zone 6a. 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 | 20.0 °F | 36.2 °F | 3.25 in. |
| February | 21.4 °F | 39.3 °F | 2.62 in. |
| March | 29.6 °F | 49.3 °F | 3.63 in. |
| April | 39.7 °F | 62.3 °F | 4.05 in. |
| May | 49.6 °F | 71.4 °F | 4.19 in. |
| June | 58.3 °F | 79.3 °F | 4.59 in. |
| July | 62.0 °F | 82.5 °F | 4.37 in. |
| August | 60.0 °F | 81.6 °F | 3.51 in. |
| September | 52.9 °F | 75.8 °F | 3.34 in. |
| October | 42.0 °F | 64.6 °F | 3.0 in. |
| November | 32.0 °F | 51.4 °F | 3.03 in. |
| December | 24.9 °F | 40.6 °F | 3.15 in. |
| Annual | 41 °F | 61.2 °F | 42.73 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 6a : -10°F to -5°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 |