Triangle, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.9 °C (low) to 19.5 °C (high). Annual precipitation averages 1088.4 Millimeters. Triangle 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 | -3.6 °C | 6.8 °C | 77.47 mm |
| February | -2.6 °C | 8.8 °C | 66.8 mm |
| March | 1.2 °C | 13.4 °C | 95 mm |
| April | 6.8 °C | 19.9 °C | 77.22 mm |
| May | 12.3 °C | 24.2 °C | 96.27 mm |
| June | 17.2 °C | 28.8 °C | 105.16 mm |
| July | 19.9 °C | 31.3 °C | 111.25 mm |
| August | 18.9 °C | 30.2 °C | 94.49 mm |
| September | 15.2 °C | 26.5 °C | 107.44 mm |
| October | 8.3 °C | 20.3 °C | 91.95 mm |
| November | 2.1 °C | 14.3 °C | 77.22 mm |
| December | -1.3 °C | 9.1 °C | 88.14 mm |
| Annual | 7.9 °C | 19.5 °C | 1088.41 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |