| 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. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 40c - Wooded Osage Plains |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 66064 - Osawatomie, KS | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 25 | 34 | 44 | 54 | 64 | 69 | 66 | 58 | 46 | 34 | 24 | 45 |
| Avg Max Temp (°F) | 39 | 46 | 57 | 68 | 76 | 85 | 90 | 89 | 81 | 70 | 55 | 43 | 67 |
| Avg Precip (In.) | 1.26 | 1.39 | 2.79 | 3.48 | 5.12 | 5.25 | 3.66 | 3.58 | 4.12 | 3.51 | 2.92 | 1.59 | 38.69 |