Minnetonka, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.6 °F (low) to 55 °F (high). Annual precipitation averages 32.2 Inches. Minnetonka 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 | 6.7 °F | 23.1 °F | 0.9 in. |
| February | 10.1 °F | 27.8 °F | 0.9 in. |
| March | 22.5 °F | 40.6 °F | 1.61 in. |
| April | 35.9 °F | 55.8 °F | 2.84 in. |
| May | 48.6 °F | 68.7 °F | 4.2 in. |
| June | 58.9 °F | 78.4 °F | 4.65 in. |
| July | 63.6 °F | 82.9 °F | 4.17 in. |
| August | 61.1 °F | 80.7 °F | 4.38 in. |
| September | 52.8 °F | 73.2 °F | 3.33 in. |
| October | 39.4 °F | 58.4 °F | 2.46 in. |
| November | 26.5 °F | 42.4 °F | 1.49 in. |
| December | 13.6 °F | 28.3 °F | 1.29 in. |
| Annual | 36.6 °F | 55 °F | 32.22 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |