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First and Last Frost Dates Calculator for Ashburn, VA

It’s easy to find your last frost date for the spring and first frost date for the fall for the United States. Just enter your zip code (or city, state) below. (The location field will accept Canadian locations but will return data from the nearest U.S. climate station.)

Dates are normal averages for a light freeze; local weather and topography may cause considerable variations. The possibility of frost occurring after the spring dates and before the fall dates is 50 percent. The classification of freeze temperatures is usually based on their effect on plants. Light freeze: 29° to 32°—tender plants killed. Moderate freeze: 25° to 28°—widely destructive to most vegetation. Severe freeze: 24° and colder—heavy damage to most plants.

Gardeners: Get growing with our Best Dates to Plant chart here.

ZIP or Postal Code or City, State
Climate StationLast Spring Frost (50% Probability)First Fall Frost (50% Probability)Growing Season
WASHINGTON DULLES INTL, VA climate stationApril 23October 13172