Courtland, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.7 °C (low) to 12.7 °C (high). Annual precipitation averages 796.5 Millimeters. Courtland is located in USDA Plant Hardiness Zone 5a. 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 | -14.8 °C | -5.1 °C | 20.32 mm |
| February | -12.6 °C | -2.4 °C | 21.84 mm |
| March | -5.6 °C | 4.4 °C | 42.67 mm |
| April | 1.4 °C | 13.3 °C | 72.64 mm |
| May | 8.3 °C | 20.3 °C | 106.17 mm |
| June | 14.4 °C | 25.8 °C | 131.32 mm |
| July | 16.5 °C | 27.6 °C | 95.25 mm |
| August | 14.9 °C | 26.3 °C | 95.5 mm |
| September | 10.2 °C | 22.8 °C | 82.8 mm |
| October | 3.2 °C | 15.1 °C | 65.28 mm |
| November | -4.2 °C | 5.8 °C | 35.81 mm |
| December | -10.8 °C | -2.1 °C | 26.92 mm |
| Annual | 1.7 °C | 12.7 °C | 796.52 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |