Newport News, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.9 °C (low) to 20.5 °C (high). Annual precipitation averages 1286.8 Millimeters. Newport News is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1 °C | 9.6 °C | 93.22 mm |
| February | 1.8 °C | 11.1 °C | 73.15 mm |
| March | 5.3 °C | 14.6 °C | 101.6 mm |
| April | 10.5 °C | 20.2 °C | 92.46 mm |
| May | 15.4 °C | 24.4 °C | 101.85 mm |
| June | 20.3 °C | 28.7 °C | 120.14 mm |
| July | 22.9 °C | 31.2 °C | 128.78 mm |
| August | 22.2 °C | 29.9 °C | 145.8 mm |
| September | 19.5 °C | 26.9 °C | 138.18 mm |
| October | 13.4 °C | 21.7 °C | 108.2 mm |
| November | 7.3 °C | 16.1 °C | 90.68 mm |
| December | 3.5 °C | 11.9 °C | 92.71 mm |
| Annual | 11.9 °C | 20.5 °C | 1286.77 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |