Brecon, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.9 °F (low) to 64.3 °F (high). Annual precipitation averages 43.8 Inches. Brecon is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.4 °F | 39.1 °F | 3.25 in. |
| February | 24.9 °F | 43.3 °F | 2.75 in. |
| March | 33.5 °F | 53.1 °F | 3.85 in. |
| April | 43.7 °F | 65.2 °F | 4.58 in. |
| May | 54.0 °F | 74.4 °F | 4.83 in. |
| June | 62.7 °F | 82.4 °F | 4.5 in. |
| July | 66.2 °F | 85.7 °F | 3.98 in. |
| August | 64.3 °F | 85.2 °F | 3.42 in. |
| September | 57.3 °F | 79.1 °F | 2.91 in. |
| October | 45.6 °F | 67.2 °F | 3.12 in. |
| November | 35.3 °F | 53.7 °F | 3.2 in. |
| December | 28.3 °F | 43.2 °F | 3.43 in. |
| Annual | 44.9 °F | 64.3 °F | 43.82 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |