Whalan, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.1 °F (low) to 55.8 °F (high). Annual precipitation averages 36.2 Inches. Whalan 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.4 °F | 24.8 °F | 1.09 in. |
| February | 10.8 °F | 29.3 °F | 1.07 in. |
| March | 23.2 °F | 41.8 °F | 1.91 in. |
| April | 35.3 °F | 56.6 °F | 3.92 in. |
| May | 47.2 °F | 68.7 °F | 4.47 in. |
| June | 57.7 °F | 78.5 °F | 5.89 in. |
| July | 61.5 °F | 82.2 °F | 4.15 in. |
| August | 59.2 °F | 80.2 °F | 4.41 in. |
| September | 50.9 °F | 73.2 °F | 3.55 in. |
| October | 38.6 °F | 59.6 °F | 2.53 in. |
| November | 26.8 °F | 43.8 °F | 1.81 in. |
| December | 14.9 °F | 30.5 °F | 1.38 in. |
| Annual | 36.1 °F | 55.8 °F | 36.18 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 4b : -25°F to -20°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 |