Fredonia, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.8 °C (low) to 10.8 °C (high). Annual precipitation averages 552.5 Millimeters. Fredonia is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.1 °C | -7.2 °C | 12.45 mm |
| February | -14.8 °C | -4.6 °C | 13.46 mm |
| March | -8.6 °C | 2.2 °C | 22.35 mm |
| April | -1.6 °C | 11.3 °C | 37.34 mm |
| May | 5.6 °C | 18.2 °C | 83.82 mm |
| June | 11.7 °C | 23.4 °C | 101.35 mm |
| July | 14.3 °C | 26.9 °C | 81.53 mm |
| August | 13 °C | 26.4 °C | 65.28 mm |
| September | 7.9 °C | 21.5 °C | 59.44 mm |
| October | 0.7 °C | 12.7 °C | 44.7 mm |
| November | -7.2 °C | 3.4 °C | 15.49 mm |
| December | -13.3 °C | -4.1 °C | 15.24 mm |
| Annual | -0.8 °C | 10.8 °C | 552.45 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |