Bern, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 17.6 °C (high). Annual precipitation averages 862.6 Millimeters. Bern 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | 2.1 °C | 19.05 mm |
| February | -6.8 °C | 5.1 °C | 26.92 mm |
| March | -1.1 °C | 11.8 °C | 53.85 mm |
| April | 4.7 °C | 17.9 °C | 84.07 mm |
| May | 11.4 °C | 23.4 °C | 123.7 mm |
| June | 17.1 °C | 28.7 °C | 116.33 mm |
| July | 19.3 °C | 31.1 °C | 112.78 mm |
| August | 17.9 °C | 30.2 °C | 95.5 mm |
| September | 12.8 °C | 26.3 °C | 86.87 mm |
| October | 5.9 °C | 19.6 °C | 67.56 mm |
| November | -0.8 °C | 11.1 °C | 46.23 mm |
| December | -6.1 °C | 4.4 °C | 29.72 mm |
| Annual | 5.5 °C | 17.6 °C | 862.58 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |