Frost Dates: First and last frost dates for Denver, Colorado

In the Spring
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
Last 16° Apr 9 Apr 1 Mar 27 Mar 22 Mar 18 Mar 13 Mar 9 Mar 3 Feb 24
Last 20° Apr 15 Apr 9 Apr 5 Apr 2 Mar 30 Mar 27 Mar 23 Mar 20 Mar 14
Last 24° Apr 27 Apr 21 Apr 16 Apr 12 Apr 9 Apr 5 Apr 2 Mar 28 Mar 22
Last 28° May 7 May 1 Apr 27 Apr 23 Apr 20 Apr 17 Apr 13 Apr 9 Apr 3
Last 32° May 13 May 9 May 5 May 2 Apr 30 Apr 27 Apr 24 Apr 21 Apr 16
Last 36° May 27 May 22 May 18 May 15 May 12 May 9 May 6 May 2 Apr 27

In the Fall
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
First 16° Oct 30 Nov 4 Nov 8 Nov 11 Nov 14 Nov 16 Nov 19 Nov 23 Nov 28
First 20° Oct 17 Oct 23 Oct 27 Oct 31 Nov 3 Nov 6 Nov 10 Nov 14 Nov 20
First 24° Oct 10 Oct 16 Oct 20 Oct 24 Oct 28 Oct 31 Nov 4 Nov 8 Nov 14
First 28° Sep 28 Oct 4 Oct 8 Oct 11 Oct 15 Oct 18 Oct 22 Oct 26 Nov 1
First 32° Sep 18 Sep 24 Sep 28 Oct 1 Oct 4 Oct 8 Oct 11 Oct 15 Oct 21
First 36° Sep 15 Sep 19 Sep 22 Sep 24 Sep 27 Sep 29 Oct 1 Oct 4 Oct 9

Now that you know your frost dates, use our Garden Planting Calendar for Denver, Colorado 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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