Manchester, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.6 °F (low) to 54.3 °F (high). Annual precipitation averages 35.3 Inches. Manchester 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 | 6.3 °F | 22.7 °F | 0.92 in. |
| February | 10.0 °F | 27.1 °F | 0.94 in. |
| March | 22.4 °F | 39.5 °F | 1.87 in. |
| April | 34.9 °F | 55.1 °F | 3.47 in. |
| May | 47.2 °F | 67.5 °F | 4.69 in. |
| June | 58.4 °F | 77.8 °F | 5.38 in. |
| July | 61.9 °F | 81.0 °F | 4.83 in. |
| August | 59.1 °F | 78.7 °F | 4.21 in. |
| September | 50.5 °F | 72.7 °F | 3.77 in. |
| October | 37.6 °F | 58.8 °F | 2.42 in. |
| November | 25.8 °F | 42.7 °F | 1.52 in. |
| December | 13.5 °F | 28.5 °F | 1.25 in. |
| Annual | 35.6 °F | 54.3 °F | 35.27 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 |