Frost Dates: First and last frost dates for Rockville, MD

In the Fall
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
First 16° Nov 24 Dec 2 Dec 7 Dec 12 Dec 16 Dec 20 Dec 25 Dec 30 Jan 6
First 20° Nov 6 Nov 15 Nov 21 Nov 26 Dec 1 Dec 6 Dec 12 Dec 18 Dec 27
First 24° Oct 21 Oct 30 Nov 6 Nov 12 Nov 17 Nov 23 Nov 28 Dec 5 Dec 15
First 28° Oct 12 Oct 19 Oct 24 Oct 28 Nov 1 Nov 5 Nov 9 Nov 14 Nov 21
First 32° Oct 3 Oct 9 Oct 14 Oct 18 Oct 21 Oct 25 Oct 29 Nov 3 Nov 9
First 36° Sep 23 Sep 29 Oct 3 Oct 7 Oct 10 Oct 14 Oct 17 Oct 22 Oct 28

In the Spring
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
Last 16° Mar 25 Mar 15 Mar 7 Mar 1 Feb 23 Feb 18 Feb 11 Feb 4 Jan 25
Last 20° Mar 31 Mar 25 Mar 20 Mar 16 Mar 12 Mar 8 Mar 4 Feb 27 Feb 21
Last 24° Apr 11 Apr 5 Mar 31 Mar 27 Mar 24 Mar 20 Mar 16 Mar 12 Mar 6
Last 28° Apr 23 Apr 16 Apr 12 Apr 8 Apr 4 Mar 31 Mar 27 Mar 23 Mar 17
Last 32° May 7 Apr 30 Apr 25 Apr 20 Apr 16 Apr 12 Apr 8 Apr 2 Mar 26
Last 36° May 21 May 13 May 8 May 3 Apr 29 Apr 25 Apr 20 Apr 15 Apr 7

Now that you know your frost dates, use our Garden Planting Calendar for Rockville, MD to know when to sow and transplant your various vegetable plants!

Data is provided by the NOAA National Centers for Environmental Information. Photography by Garden.org member TBGDN.

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