| 2023 Hardiness Zone: | Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 42b - Collapsed Glacial Outwash |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 58575 - Turtle Lake, ND | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -3 | 5 | 17 | 29 | 42 | 51 | 56 | 54 | 43 | 32 | 16 | 3 | 29 |
| Avg Max Temp (°F) | 18 | 25 | 37 | 54 | 68 | 76 | 82 | 81 | 70 | 57 | 36 | 23 | 52 |
| Avg Precip (In.) | .61 | .48 | .82 | 1.46 | 2.2 | 3.31 | 2.7 | 1.96 | 1.56 | 1.33 | .71 | .51 | 17.63 |