Wheaton, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.4 °F (low) to 53.1 °F (high). Annual precipitation averages 25.3 Inches. Wheaton is located in USDA Plant Hardiness Zone 4b. 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 | 1.2 °F | 19.8 °F | 0.72 in. |
| February | 4.7 °F | 24.0 °F | 0.66 in. |
| March | 18.4 °F | 37.0 °F | 1.12 in. |
| April | 32.0 °F | 54.0 °F | 2.3 in. |
| May | 45.2 °F | 67.9 °F | 2.94 in. |
| June | 56.4 °F | 77.5 °F | 4.15 in. |
| July | 60.2 °F | 81.8 °F | 3.82 in. |
| August | 57.2 °F | 80.0 °F | 2.8 in. |
| September | 48.1 °F | 72.4 °F | 2.64 in. |
| October | 35.4 °F | 57.2 °F | 2.4 in. |
| November | 21.8 °F | 39.9 °F | 0.99 in. |
| December | 8.7 °F | 25.6 °F | 0.79 in. |
| Annual | 32.4 °F | 53.1 °F | 25.33 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 4b : -25°F to -20°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 |