Rosston, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.7 °C (low) to 22 °C (high). Annual precipitation averages 579.7 Millimeters. Rosston is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.8 °C | 9.3 °C | 17.78 mm |
| February | -4.3 °C | 11.2 °C | 19.05 mm |
| March | 0.6 °C | 16.8 °C | 41.15 mm |
| April | 5.5 °C | 21.4 °C | 54.1 mm |
| May | 11.7 °C | 26.8 °C | 69.09 mm |
| June | 17.6 °C | 31.8 °C | 89.41 mm |
| July | 20.2 °C | 34.9 °C | 67.06 mm |
| August | 19.2 °C | 33.9 °C | 78.49 mm |
| September | 14.3 °C | 29.7 °C | 40.64 mm |
| October | 6.8 °C | 22.8 °C | 52.58 mm |
| November | -0.2 °C | 15.7 °C | 22.61 mm |
| December | -5.1 °C | 9.4 °C | 27.69 mm |
| Annual | 6.7 °C | 22 °C | 579.65 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |