| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F |
| Average First Frost Date: | Sep.11 - Sep. 20 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 46b - Turtle Mountains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 58316 - Belcourt, ND | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -8 | -1 | 11 | 26 | 39 | 49 | 53 | 51 | 40 | 28 | 13 | -2 | 25 |
| Avg Max Temp (°F) | 13 | 21 | 31 | 50 | 65 | 73 | 78 | 77 | 66 | 53 | 32 | 18 | 48 |
| Avg Precip (In.) | .43 | .4 | .62 | 1.11 | 2.3 | 3.46 | 2.94 | 2.6 | 1.93 | 1.19 | .65 | .46 | 18.08 |