Perham, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.3 °F (low) to 50.8 °F (high). Annual precipitation averages 26.8 Inches. Perham is located in USDA Plant Hardiness Zone 4a. 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 | -0.7 °F | 17.9 °F | 0.65 in. |
| February | 2.4 °F | 22.8 °F | 0.62 in. |
| March | 16.4 °F | 35.8 °F | 1.11 in. |
| April | 30.6 °F | 51.9 °F | 2.0 in. |
| May | 43.8 °F | 65.3 °F | 3.44 in. |
| June | 54.8 °F | 74.7 °F | 4.41 in. |
| July | 59.3 °F | 79.3 °F | 4.11 in. |
| August | 56.6 °F | 77.6 °F | 3.08 in. |
| September | 48.3 °F | 69.6 °F | 2.89 in. |
| October | 35.1 °F | 54.1 °F | 2.67 in. |
| November | 21.2 °F | 37.1 °F | 0.97 in. |
| December | 7.5 °F | 23.6 °F | 0.81 in. |
| Annual | 31.3 °F | 50.8 °F | 26.76 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |