| 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: | 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: | 48a - Glacial Lake Agassiz Basin | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 56547 - Glyndon, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -4 | 4 | 18 | 32 | 45 | 54 | 59 | 57 | 46 | 34 | 18 | 3 | 30 |
| Avg Max Temp (°F) | 16 | 23 | 35 | 54 | 69 | 77 | 82 | 81 | 70 | 56 | 35 | 21 | 52 |
| Avg Precip (In.) | .69 | .5 | 1.09 | 1.47 | 2.6 | 3.55 | 3.33 | 2.73 | 2.24 | 2.01 | .97 | .52 | 21.72 |