Carnegie, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 23.1 °C (high). Annual precipitation averages 786.9 Millimeters. Carnegie is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.1 °C | 10.8 °C | 26.42 mm |
| February | -1.1 °C | 12.9 °C | 31.75 mm |
| March | 3.5 °C | 18 °C | 57.91 mm |
| April | 8.1 °C | 22.7 °C | 80.26 mm |
| May | 14.2 °C | 27.6 °C | 120.9 mm |
| June | 19.3 °C | 32.4 °C | 104.65 mm |
| July | 21.4 °C | 35.2 °C | 64.77 mm |
| August | 20.6 °C | 34.7 °C | 80.52 mm |
| September | 16.3 °C | 30.3 °C | 72.14 mm |
| October | 9.5 °C | 24.2 °C | 71.12 mm |
| November | 3.1 °C | 17.1 °C | 39.62 mm |
| December | -1.9 °C | 11.2 °C | 36.83 mm |
| Annual | 9.2 °C | 23.1 °C | 786.89 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |