Porter, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.2 °F (low) to 71.5 °F (high). Annual precipitation averages 43.6 Inches. Porter 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 | 27.0 °F | 49.0 °F | 2.11 in. |
| February | 30.4 °F | 53.2 °F | 2.22 in. |
| March | 39.0 °F | 62.4 °F | 3.5 in. |
| April | 47.9 °F | 71.4 °F | 4.5 in. |
| May | 58.1 °F | 78.7 °F | 6.09 in. |
| June | 67.3 °F | 87.3 °F | 4.34 in. |
| July | 71.1 °F | 92.1 °F | 3.73 in. |
| August | 69.6 °F | 92.3 °F | 3.28 in. |
| September | 61.6 °F | 85.0 °F | 4.04 in. |
| October | 49.4 °F | 73.6 °F | 4.01 in. |
| November | 38.6 °F | 62.0 °F | 3.19 in. |
| December | 29.8 °F | 51.0 °F | 2.61 in. |
| Annual | 49.2 °F | 71.5 °F | 43.62 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |