| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| 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: | 43n - Central Grassland |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 59044 - Laurel, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 24 | 33 | 42 | 49 | 55 | 53 | 43 | 34 | 23 | 15 | 33 |
| Avg Max Temp (°F) | 34 | 41 | 50 | 59 | 69 | 79 | 86 | 86 | 74 | 62 | 45 | 36 | 60 |
| Avg Precip (In.) | .76 | .47 | 1.01 | 1.58 | 2.66 | 1.75 | 1.16 | .95 | 1.38 | 1.31 | .62 | .67 | 14.32 |