| 2023 Hardiness Zone: | Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 51h - St. Croix Outwash Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 56364 - Pierz, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -2 | 5 | 18 | 31 | 44 | 54 | 59 | 56 | 47 | 35 | 21 | 5 | 31 |
| Avg Max Temp (°F) | 19 | 27 | 39 | 56 | 70 | 78 | 82 | 80 | 71 | 58 | 38 | 24 | 53 |
| Avg Precip (In.) | .8 | .62 | 1.47 | 1.92 | 3.16 | 4.18 | 3.89 | 3.64 | 2.83 | 2.39 | 1.51 | .67 | 27.09 |