Caddo, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.5 °C (low) to 23.3 °C (high). Annual precipitation averages 1122.2 Millimeters. Caddo is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.2 °C | 11.3 °C | 61.72 mm |
| February | 0.9 °C | 13.7 °C | 65.53 mm |
| March | 5.4 °C | 18.3 °C | 96.27 mm |
| April | 9.7 °C | 22.8 °C | 104.9 mm |
| May | 15.3 °C | 26.9 °C | 152.65 mm |
| June | 20 °C | 31.6 °C | 114.55 mm |
| July | 21.9 °C | 34.4 °C | 79.76 mm |
| August | 21.3 °C | 34.7 °C | 69.6 mm |
| September | 17.3 °C | 30.6 °C | 98.55 mm |
| October | 10.7 °C | 24.4 °C | 110.74 mm |
| November | 4.9 °C | 18.1 °C | 85.09 mm |
| December | 0.1 °C | 12.3 °C | 82.8 mm |
| Annual | 10.5 °C | 23.3 °C | 1122.16 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |