Etowah, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 22.5 °C (high). Annual precipitation averages 987.8 Millimeters. Etowah is located in USDA Plant Hardiness Zone 7b. 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 | -2.7 °C | 10.3 °C | 38.35 mm |
| February | -0.6 °C | 12.8 °C | 46.48 mm |
| March | 4.2 °C | 17.7 °C | 73.41 mm |
| April | 8.8 °C | 22.6 °C | 98.04 mm |
| May | 14.5 °C | 26.4 °C | 137.16 mm |
| June | 19.3 °C | 30.8 °C | 120.4 mm |
| July | 21.6 °C | 33.9 °C | 91.69 mm |
| August | 20.8 °C | 33.9 °C | 76.71 mm |
| September | 16.4 °C | 29.6 °C | 102.11 mm |
| October | 9.9 °C | 23.6 °C | 90.42 mm |
| November | 3.8 °C | 17 °C | 57.91 mm |
| December | -1.1 °C | 11.3 °C | 55.12 mm |
| Annual | 9.6 °C | 22.5 °C | 987.8 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |