| 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 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 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 42i - Glaciated Dark Brown Prairie | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 58784 - Stanley, ND | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -4 | 4 | 14 | 27 | 39 | 49 | 53 | 51 | 40 | 29 | 15 | 1 | 26 |
| Avg Max Temp (°F) | 16 | 23 | 35 | 52 | 66 | 75 | 80 | 80 | 68 | 54 | 34 | 21 | 50 |
| Avg Precip (In.) | .55 | .47 | .85 | 1.51 | 2.51 | 3.71 | 2.88 | 2.03 | 2.12 | 1.22 | .75 | .52 | 19.12 |