Valley Brook, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10 °C (low) to 22 °C (high). Annual precipitation averages 906.8 Millimeters. Valley Brook 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 | 9.8 °C | 33.27 mm |
| February | -0.4 °C | 12.2 °C | 38.86 mm |
| March | 4.1 °C | 17.1 °C | 66.8 mm |
| April | 9.2 °C | 21.9 °C | 88.9 mm |
| May | 15 °C | 26.1 °C | 132.84 mm |
| June | 20 °C | 30.8 °C | 116.84 mm |
| July | 22.3 °C | 33.9 °C | 89.66 mm |
| August | 21.5 °C | 33.6 °C | 77.98 mm |
| September | 17.2 °C | 29.2 °C | 88.9 mm |
| October | 10.4 °C | 23.1 °C | 79.5 mm |
| November | 3.9 °C | 16.2 °C | 47.75 mm |
| December | -0.9 °C | 10.6 °C | 45.47 mm |
| Annual | 10 °C | 22 °C | 906.77 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |