Manchester, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.9 °C (low) to 21.5 °C (high). Annual precipitation averages 834.7 Millimeters. Manchester 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5 °C | 8.3 °C | 24.89 mm |
| February | -3.3 °C | 10.4 °C | 31.24 mm |
| March | 1.8 °C | 16 °C | 60.71 mm |
| April | 6.6 °C | 20.9 °C | 77.98 mm |
| May | 12.9 °C | 26.2 °C | 115.32 mm |
| June | 18.6 °C | 31.8 °C | 118.11 mm |
| July | 21.1 °C | 34.6 °C | 93.47 mm |
| August | 20.2 °C | 33.7 °C | 93.22 mm |
| September | 15.6 °C | 29.5 °C | 67.56 mm |
| October | 8.3 °C | 22.6 °C | 77.98 mm |
| November | 1.6 °C | 15.3 °C | 39.37 mm |
| December | -3.7 °C | 8.7 °C | 34.8 mm |
| Annual | 7.9 °C | 21.5 °C | 834.65 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |