Dover, 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 873.2 Millimeters. Dover 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 °C | 9.3 °C | 28.19 mm |
| February | -2.3 °C | 11.3 °C | 37.34 mm |
| March | 2.5 °C | 16.7 °C | 62.99 mm |
| April | 7.2 °C | 21.6 °C | 92.2 mm |
| May | 13.4 °C | 26.7 °C | 124.21 mm |
| June | 19.1 °C | 32 °C | 119.63 mm |
| July | 21.6 °C | 35.2 °C | 79.25 mm |
| August | 20.7 °C | 34.5 °C | 89.15 mm |
| September | 16.2 °C | 30.2 °C | 74.93 mm |
| October | 9.2 °C | 23.2 °C | 78.23 mm |
| November | 2.4 °C | 16.1 °C | 46.99 mm |
| December | -2.7 °C | 9.9 °C | 40.13 mm |
| Annual | 8.6 °C | 22.2 °C | 873.24 mm |
| 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 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 |