| 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 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 |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Aug. 11 - Aug. 20 |
| Average Last Frost Date: | Jun. 11 - Jun. 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 18d - Foothill Shrublands and Low Mountains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 83101 - Kemmerer, WY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 6 | 16 | 24 | 32 | 39 | 45 | 44 | 34 | 25 | 14 | 5 | 24 |
| Avg Max Temp (°F) | 29 | 33 | 41 | 51 | 62 | 73 | 81 | 79 | 69 | 56 | 40 | 30 | 54 |
| Avg Precip (In.) | .64 | .54 | .64 | .94 | 1.15 | .97 | .85 | 1.04 | 1.08 | .83 | .77 | .53 | 9.98 |