| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 25d - Flat to Rolling Plains |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 80103 - Byers, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 23 | 32 | 41 | 51 | 57 | 55 | 46 | 34 | 21 | 14 | 34 |
| Avg Max Temp (°F) | 41 | 46 | 53 | 61 | 71 | 83 | 89 | 86 | 78 | 67 | 50 | 42 | 64 |
| Avg Precip (In.) | .43 | .35 | 1.06 | 1.59 | 2.75 | 1.91 | 2.32 | 1.88 | 1.16 | .83 | .8 | .43 | 15.52 |