Forest Park, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 22 °C (high). Annual precipitation averages 874 Millimeters. Forest Park 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 | -2.6 °C | 9.7 °C | 32.51 mm |
| February | -0.6 °C | 11.9 °C | 38.1 mm |
| March | 4.2 °C | 17.2 °C | 65.28 mm |
| April | 9 °C | 21.9 °C | 83.82 mm |
| May | 14.9 °C | 26.2 °C | 131.06 mm |
| June | 19.9 °C | 30.8 °C | 113.03 mm |
| July | 22.3 °C | 33.9 °C | 85.85 mm |
| August | 21.4 °C | 33.6 °C | 76.2 mm |
| September | 17 °C | 29.3 °C | 86.61 mm |
| October | 10.3 °C | 23.1 °C | 74.93 mm |
| November | 3.8 °C | 16.2 °C | 42.67 mm |
| December | -1 °C | 10.6 °C | 43.94 mm |
| Annual | 9.9 °C | 22 °C | 874 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |