| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| 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 |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55070 - Saint Francis, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 1 | 8 | 21 | 33 | 46 | 55 | 60 | 57 | 48 | 37 | 23 | 8 | 33 |
| Avg Max Temp (°F) | 20 | 28 | 40 | 56 | 70 | 77 | 81 | 79 | 70 | 58 | 38 | 24 | 53 |
| Avg Precip (In.) | 1 | .86 | 1.61 | 2.33 | 3.21 | 4.42 | 4 | 4.68 | 3.32 | 2.2 | 1.86 | .88 | 30.39 |