| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F 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 4b: -25F to -20F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 50b - Minnesota/Wisconsin Upland Till Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55718 - Carlton, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -2 | 5 | 16 | 28 | 38 | 47 | 54 | 53 | 45 | 34 | 21 | 5 | 29 |
| Avg Max Temp (°F) | 20 | 27 | 38 | 53 | 67 | 75 | 80 | 77 | 68 | 55 | 37 | 24 | 52 |
| Avg Precip (In.) | 1.07 | .75 | 1.61 | 1.96 | 3.01 | 4.17 | 4.19 | 4.13 | 3.96 | 2.54 | 2.06 | .97 | 30.43 |