Hamburg, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 54.2 °F (high). Annual precipitation averages 32.1 Inches. Hamburg 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 | 5.1 °F | 22.1 °F | 0.95 in. |
| February | 8.4 °F | 26.8 °F | 0.95 in. |
| March | 21.2 °F | 39.2 °F | 1.62 in. |
| April | 34.4 °F | 54.9 °F | 2.84 in. |
| May | 47.2 °F | 68.0 °F | 4.29 in. |
| June | 58.1 °F | 77.8 °F | 4.98 in. |
| July | 62.1 °F | 82.2 °F | 3.88 in. |
| August | 59.3 °F | 79.6 °F | 4.3 in. |
| September | 50.9 °F | 72.7 °F | 3.18 in. |
| October | 37.7 °F | 58.2 °F | 2.35 in. |
| November | 25.1 °F | 41.5 °F | 1.52 in. |
| December | 12.1 °F | 27.6 °F | 1.25 in. |
| Annual | 35.1 °F | 54.2 °F | 32.11 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |