Watson, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.1 °C (low) to 12.6 °C (high). Annual precipitation averages 704.1 Millimeters. Watson 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 | -15.7 °C | -5.4 °C | 19.81 mm |
| February | -13.7 °C | -2.8 °C | 20.57 mm |
| March | -6.5 °C | 3.9 °C | 37.34 mm |
| April | 0.7 °C | 12.9 °C | 63.5 mm |
| May | 7.9 °C | 20.5 °C | 84.84 mm |
| June | 14.1 °C | 25.9 °C | 104.9 mm |
| July | 16.1 °C | 28.1 °C | 96.27 mm |
| August | 14.4 °C | 26.8 °C | 94.23 mm |
| September | 9.7 °C | 23.2 °C | 69.85 mm |
| October | 2.4 °C | 15.2 °C | 59.69 mm |
| November | -4.8 °C | 5.6 °C | 31.24 mm |
| December | -11.7 °C | -2.4 °C | 21.84 mm |
| Annual | 1.1 °C | 12.6 °C | 704.08 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |