| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 28a - Flint Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 66442 - Fort Riley, KS | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 22 | 31 | 42 | 53 | 62 | 67 | 65 | 56 | 44 | 31 | 21 | 43 |
| Avg Max Temp (°F) | 39 | 46 | 56 | 67 | 77 | 86 | 92 | 90 | 81 | 71 | 54 | 42 | 67 |
| Avg Precip (In.) | .8 | .96 | 2.57 | 2.98 | 4.82 | 4.68 | 4.21 | 3.55 | 3.32 | 2.7 | 2.06 | 1.1 | 33.74 |