| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 25e - Rolling Cropland and Range | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 73942 - Guymon, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 22 | 30 | 39 | 50 | 60 | 64 | 63 | 55 | 42 | 29 | 21 | 41 |
| Avg Max Temp (°F) | 46 | 52 | 60 | 70 | 78 | 88 | 93 | 91 | 83 | 73 | 58 | 48 | 70 |
| Avg Precip (In.) | .37 | .41 | 1.19 | 1.47 | 3.08 | 2.56 | 2.5 | 2.21 | 1.63 | 1.21 | .7 | .41 | 17.73 |