| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 40b - Osage Cuestas |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 74003 - Bartlesville, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 28 | 37 | 47 | 56 | 65 | 70 | 68 | 60 | 48 | 37 | 27 | 47 |
| Avg Max Temp (°F) | 46 | 53 | 63 | 73 | 80 | 88 | 94 | 93 | 85 | 74 | 60 | 49 | 71 |
| Avg Precip (In.) | 1.41 | 1.88 | 3.44 | 3.79 | 4.85 | 4.5 | 3.02 | 2.94 | 4.48 | 3.52 | 3.22 | 2.01 | 39.06 |