Cimarron City, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.6 °C (low) to 22.2 °C (high). Annual precipitation averages 904.7 Millimeters. Cimarron City is located in USDA Plant Hardiness Zone 7a. 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 | -4.2 °C | 9.4 °C | 28.7 mm |
| February | -2.4 °C | 11.3 °C | 37.59 mm |
| March | 2.4 °C | 16.9 °C | 65.53 mm |
| April | 7.3 °C | 21.9 °C | 100.84 mm |
| May | 13.3 °C | 26.6 °C | 126.75 mm |
| June | 18.9 °C | 31.6 °C | 120.14 mm |
| July | 21.6 °C | 34.6 °C | 83.82 mm |
| August | 20.7 °C | 34.2 °C | 85.85 mm |
| September | 16.3 °C | 29.9 °C | 78.74 mm |
| October | 9.4 °C | 23.2 °C | 84.07 mm |
| November | 2.7 °C | 16.2 °C | 49.53 mm |
| December | -2.4 °C | 10.1 °C | 43.18 mm |
| Annual | 8.6 °C | 22.2 °C | 904.74 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 7a : -17.8°C to -15°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 |