Jasper, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.6 °F (low) to 55.1 °F (high). Annual precipitation averages 28.8 Inches. Jasper is located in USDA Plant Hardiness Zone 5a. 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 | 6.0 °F | 23.8 °F | 0.63 in. |
| February | 10.0 °F | 28.6 °F | 0.8 in. |
| March | 21.6 °F | 40.8 °F | 1.43 in. |
| April | 33.4 °F | 55.8 °F | 2.88 in. |
| May | 46.3 °F | 68.0 °F | 3.76 in. |
| June | 57.6 °F | 78.2 °F | 4.35 in. |
| July | 61.3 °F | 82.3 °F | 3.72 in. |
| August | 58.5 °F | 80.0 °F | 3.52 in. |
| September | 49.6 °F | 73.3 °F | 3.34 in. |
| October | 36.3 °F | 59.2 °F | 2.21 in. |
| November | 23.0 °F | 42.6 °F | 1.18 in. |
| December | 11.7 °F | 28.5 °F | 0.94 in. |
| Annual | 34.6 °F | 55.1 °F | 28.76 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |