Elgin, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.8 °C (low) to 23.1 °C (high). Annual precipitation averages 832.1 Millimeters. Elgin 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.3 °C | 11 °C | 30.73 mm |
| February | -0.4 °C | 13.1 °C | 38.35 mm |
| March | 4.3 °C | 18.2 °C | 60.45 mm |
| April | 8.8 °C | 22.7 °C | 84.58 mm |
| May | 14.6 °C | 27.2 °C | 117.86 mm |
| June | 19.6 °C | 31.9 °C | 108.71 mm |
| July | 21.8 °C | 35 °C | 66.8 mm |
| August | 21.2 °C | 34.8 °C | 72.39 mm |
| September | 16.8 °C | 30.3 °C | 82.8 mm |
| October | 10.1 °C | 24 °C | 81.28 mm |
| November | 3.8 °C | 17.2 °C | 44.96 mm |
| December | -1.2 °C | 11.5 °C | 43.18 mm |
| Annual | 9.8 °C | 23.1 °C | 832.09 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |