| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | 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 1 - May 10 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 27b - Rolling Plains and Breaks | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 69001 - Mc Cook, NE | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 26 | 35 | 47 | 57 | 63 | 61 | 50 | 37 | 24 | 16 | 37 |
| Avg Max Temp (°F) | 38 | 45 | 53 | 64 | 73 | 84 | 90 | 88 | 79 | 68 | 51 | 41 | 65 |
| Avg Precip (In.) | .49 | .61 | 1.4 | 2.17 | 3.32 | 3.21 | 3.3 | 2.74 | 1.4 | 1.27 | 1.07 | .51 | 21.49 |