Panama, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 22.8 °C (high). Annual precipitation averages 1236.5 Millimeters. Panama 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 | -2.4 °C | 10.5 °C | 76.71 mm |
| February | -0.3 °C | 12.9 °C | 72.39 mm |
| March | 4.2 °C | 17.7 °C | 108.46 mm |
| April | 8.8 °C | 22.8 °C | 124.71 mm |
| May | 14.6 °C | 26.7 °C | 149.86 mm |
| June | 19.6 °C | 31.4 °C | 108.71 mm |
| July | 21.6 °C | 34.2 °C | 92.2 mm |
| August | 20.8 °C | 34.1 °C | 80.52 mm |
| September | 16.4 °C | 30.1 °C | 110.74 mm |
| October | 9.4 °C | 24.1 °C | 103.63 mm |
| November | 3.7 °C | 17.4 °C | 114.81 mm |
| December | -0.8 °C | 11.8 °C | 93.73 mm |
| Annual | 9.6 °C | 22.8 °C | 1236.47 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 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |