Lamberton, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.7 °F (low) to 55.1 °F (high). Annual precipitation averages 29.5 Inches. Lamberton is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.3 °F | 23.1 °F | 0.66 in. |
| February | 9.3 °F | 27.7 °F | 0.74 in. |
| March | 21.4 °F | 39.7 °F | 1.57 in. |
| April | 33.6 °F | 55.6 °F | 2.93 in. |
| May | 46.9 °F | 69.0 °F | 4.01 in. |
| June | 58.1 °F | 79.1 °F | 4.69 in. |
| July | 61.4 °F | 82.7 °F | 3.74 in. |
| August | 58.5 °F | 80.2 °F | 3.51 in. |
| September | 49.7 °F | 73.9 °F | 3.18 in. |
| October | 36.7 °F | 59.6 °F | 2.24 in. |
| November | 23.7 °F | 42.3 °F | 1.27 in. |
| December | 11.8 °F | 28.4 °F | 0.92 in. |
| Annual | 34.7 °F | 55.1 °F | 29.46 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |