| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 3a: -40°F to -35°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Aug. 11 - Aug. 20 |
| Average Last Frost Date: | Jun. 21 - Jun. 30 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 17i - Absaroka-Gallatin Volcanic Mountains |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 59030 - Gardiner, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 4 | 10 | 17 | 26 | 33 | 38 | 36 | 29 | 21 | 11 | 2 | 19 |
| Avg Max Temp (°F) | 23 | 30 | 37 | 44 | 54 | 64 | 73 | 72 | 62 | 49 | 32 | 23 | 47 |
| Avg Precip (In.) | 4.01 | 3.35 | 3.73 | 3.47 | 3.64 | 3.01 | 2.06 | 1.97 | 2.14 | 2.52 | 3.75 | 4.33 | 37.97 |