Foreston, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.1 °F (low) to 52.9 °F (high). Annual precipitation averages 30.2 Inches. Foreston is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.6 °F | 20.9 °F | 0.64 in. |
| February | 5.3 °F | 26.3 °F | 0.8 in. |
| March | 18.1 °F | 38.7 °F | 1.43 in. |
| April | 31.3 °F | 53.4 °F | 2.65 in. |
| May | 44.1 °F | 66.9 °F | 3.87 in. |
| June | 54.5 °F | 76.2 °F | 4.28 in. |
| July | 58.9 °F | 80.5 °F | 4.3 in. |
| August | 56.2 °F | 78.6 °F | 4.0 in. |
| September | 47.9 °F | 71.0 °F | 2.98 in. |
| October | 35.2 °F | 56.3 °F | 2.77 in. |
| November | 22.6 °F | 39.6 °F | 1.45 in. |
| December | 9.8 °F | 26.1 °F | 1.01 in. |
| Annual | 32.1 °F | 52.9 °F | 30.18 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |