McIntosh, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29 °F (low) to 49.4 °F (high). Annual precipitation averages 25.7 Inches. 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 | -3.1 °F | 15.4 °F | 0.73 in. |
| February | -0.7 °F | 20.1 °F | 0.7 in. |
| March | 14.1 °F | 33.8 °F | 0.97 in. |
| April | 29.1 °F | 50.6 °F | 1.46 in. |
| May | 42.0 °F | 64.8 °F | 3.25 in. |
| June | 53.2 °F | 73.9 °F | 4.49 in. |
| July | 56.6 °F | 78.5 °F | 3.55 in. |
| August | 54.0 °F | 77.6 °F | 3.25 in. |
| September | 45.3 °F | 68.7 °F | 3.11 in. |
| October | 33.4 °F | 52.9 °F | 2.25 in. |
| November | 18.9 °F | 35.3 °F | 0.93 in. |
| December | 4.9 °F | 21.4 °F | 0.97 in. |
| Annual | 29 °F | 49.4 °F | 25.66 in. |
| 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 : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |