Bremen, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 17 °C (high). Annual precipitation averages 1071.9 Millimeters. Bremen 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 | -6.7 °C | 3 °C | 81.28 mm |
| February | -5.8 °C | 4.7 °C | 66.8 mm |
| March | -1.6 °C | 10.3 °C | 91.95 mm |
| April | 4.1 °C | 17.7 °C | 100.84 mm |
| May | 10 °C | 22.8 °C | 106.17 mm |
| June | 15 °C | 27.3 °C | 113.54 mm |
| July | 17 °C | 29 °C | 109.98 mm |
| August | 15.9 °C | 28.5 °C | 89.66 mm |
| September | 11.8 °C | 25.3 °C | 82.3 mm |
| October | 5.3 °C | 18.7 °C | 74.93 mm |
| November | -0.1 °C | 11.6 °C | 75.18 mm |
| December | -3.7 °C | 5.4 °C | 79.25 mm |
| Annual | 5.1 °C | 17 °C | 1071.88 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |