| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°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: | Sep.1 - Sep. 10 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 18c - Wet Valleys |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 82520 - Lander, WY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 13 | 22 | 30 | 39 | 48 | 54 | 53 | 43 | 32 | 18 | 9 | 31 |
| Avg Max Temp (°F) | 32 | 38 | 47 | 56 | 66 | 77 | 85 | 84 | 72 | 59 | 42 | 33 | 58 |
| Avg Precip (In.) | .51 | .54 | 1.23 | 2.06 | 2.37 | 1.13 | .85 | .55 | 1.14 | 1.36 | .99 | .61 | 13.34 |