Frost Dates for Reston, Virginia, United States of America

Coordinates: 38.969, -77.341

Growing Season

The last spring air frost in Reston, Virginia, United States of America typically occurs around Apr 14, and the first autumn air frost around Oct 4. This gives a frost-free growing season of approximately 173 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 7a, where the average annual extreme minimum temperature is -17.8 to -15°C (0 to 5°F). This zone rating helps gardeners determine which perennial plants are likely to survive winter.

Temperature Overview

The coldest month is January, with an average low of -3°C (27°F). The warmest month is July, with an average high of 32°C (90°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Apr 14 (last spring) to Oct 4 (first autumn). Light ground frost (-1°C / 30°F): Apr 4 (last spring) to Oct 13 (first autumn). Hard ground frost (-2°C / 28°F): Mar 16 (last spring) to Oct 29 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 7a

... and the frost data for your area is ...

Current Risk Level: Light Ground Frost possible

for today based on past data only.

We predict a frost free growing season at your location from Apr 14 to Oct 4, which provides approximately 172 frost free days.

For the less tender plants, or if you are planning to protect your plants with fleece etc, your growing season could stretch from Apr 4 to Oct 13, which provides a total of 192 days for growing.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec