Climax, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1 °C (low) to 10 °C (high). Annual precipitation averages 599.4 Millimeters. Climax is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -19.1 °C | -9.4 °C | 19.56 mm |
| February | -17.1 °C | -6.7 °C | 17.27 mm |
| March | -9.2 °C | 0.6 °C | 24.64 mm |
| April | -0.8 °C | 10.6 °C | 33.27 mm |
| May | 6.2 °C | 18.6 °C | 73.66 mm |
| June | 12.7 °C | 24 °C | 104.14 mm |
| July | 14.7 °C | 26.6 °C | 88.39 mm |
| August | 12.8 °C | 26.1 °C | 69.6 mm |
| September | 7.9 °C | 21.2 °C | 71.63 mm |
| October | 1.2 °C | 12.3 °C | 51.56 mm |
| November | -6.8 °C | 2.5 °C | 22.61 mm |
| December | -14.4 °C | -6.1 °C | 23.11 mm |
| Annual | -1 °C | 10 °C | 599.44 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |