McIntosh, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.7 °C (low) to 9.7 °C (high). Annual precipitation averages 651.8 Millimeters. McIntosh is located in USDA Plant Hardiness Zone 3b. 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 | -19.5 °C | -9.2 °C | 18.54 mm |
| February | -18.2 °C | -6.6 °C | 17.78 mm |
| March | -9.9 °C | 1 °C | 24.64 mm |
| April | -1.6 °C | 10.3 °C | 37.08 mm |
| May | 5.6 °C | 18.2 °C | 82.55 mm |
| June | 11.8 °C | 23.3 °C | 114.05 mm |
| July | 13.7 °C | 25.8 °C | 90.17 mm |
| August | 12.2 °C | 25.3 °C | 82.55 mm |
| September | 7.4 °C | 20.4 °C | 78.99 mm |
| October | 0.8 °C | 11.6 °C | 57.15 mm |
| November | -7.3 °C | 1.8 °C | 23.62 mm |
| December | -15.1 °C | -5.9 °C | 24.64 mm |
| Annual | -1.7 °C | 9.7 °C | 651.76 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 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |