Turtle River, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.5 °F (low) to 49.8 °F (high). Annual precipitation averages 25.3 Inches. Turtle River is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.6 °F | 17.1 °F | 0.71 in. |
| February | 0.4 °F | 23.1 °F | 0.65 in. |
| March | 14.2 °F | 36.4 °F | 0.98 in. |
| April | 28.3 °F | 50.4 °F | 1.69 in. |
| May | 41.7 °F | 64.3 °F | 2.88 in. |
| June | 52.6 °F | 73.5 °F | 4.14 in. |
| July | 57.2 °F | 78.1 °F | 3.68 in. |
| August | 54.9 °F | 76.6 °F | 3.07 in. |
| September | 46.3 °F | 67.4 °F | 3.0 in. |
| October | 34.3 °F | 52.2 °F | 2.44 in. |
| November | 20.5 °F | 35.7 °F | 1.15 in. |
| December | 6.1 °F | 22.7 °F | 0.86 in. |
| Annual | 29.5 °F | 49.8 °F | 25.25 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |