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First and last freeze/frost dates for San Antonio, TX ,United States

First and last freeze/frost dates for:
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Each winter, on average, your risk of frost is from November 12 through March 20.

Almost certainly, however, you will receive frost from November 29 through February 25.

You are almost guaranteed that you will not get frost from April 11 through October 27.

Your frost-free growing season is around 237 days.

Detailed station data* follows:

Boerne, TX (Kendall county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° Apr 11 Apr 3 Mar 29 Mar 24 Mar 20 Mar 15 Mar 10 Mar 5 Feb 25
Spring 28° Mar 28 Mar 20 Mar 14 Mar 9 Mar 4 Feb 27 Feb 22 Feb 16 Feb 7
Spring 24° Mar 11 Mar 1 Feb 22 Feb 16 Feb 10 Feb 5 Jan 29 Jan 22 Jan 10
Fall 32° Oct 27 Nov 1 Nov 5 Nov 8 Nov 12 Nov 15 Nov 19 Nov 23 Nov 29
Fall 28° Nov 3 Nov 10 Nov 15 Nov 19 Nov 23 Nov 27 Dec 2 Dec 7 Dec 14
Fall 24° Nov 18 Nov 25 Dec 1 Dec 6 Dec 10 Dec 15 Dec 20 Dec 25 Jan 3

San Antonio Wb Ap, TX (Bexar county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° Mar 21 Mar 14 Mar 9 Mar 4 Feb 28 Feb 23 Feb 19 Feb 13 Feb 6
Spring 28° Mar 13 Mar 1 Feb 20 Feb 13 Feb 6 Jan 30 Jan 23 Jan 14 Jan 2
Spring 24° Feb 21 Feb 10 Feb 2 Jan 26 Jan 20 Jan 13 Jan 5 Dec 25 - -
Fall 32° Nov 7 Nov 13 Nov 17 Nov 21 Nov 24 Nov 28 Dec 2 Dec 7 Dec 13
Fall 28° Nov 14 Nov 23 Nov 29 Dec 5 Dec 10 Dec 16 Dec 21 Dec 27 Jan 5
Fall 24° Dec 2 Dec 12 Dec 20 Dec 27 Jan 3 Jan 10 Jan 18 Jan 31 - -

Canyon Dam, TX (Comal county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° Mar 21 Mar 12 Mar 6 Mar 1 Feb 24 Feb 19 Feb 14 Feb 7 Jan 30
Spring 28° Mar 10 Feb 28 Feb 21 Feb 15 Feb 9 Feb 3 Jan 27 Jan 19 Jan 7
Spring 24° Feb 25 Feb 15 Feb 8 Feb 1 Jan 26 Jan 20 Jan 13 Jan 4 Dec 19
Fall 32° Nov 10 Nov 17 Nov 22 Nov 26 Dec 1 Dec 5 Dec 9 Dec 14 Dec 21
Fall 28° Nov 15 Nov 24 Dec 1 Dec 7 Dec 12 Dec 17 Dec 23 Dec 30 Jan 10
Fall 24° Dec 3 Dec 13 Dec 21 Dec 27 Jan 3 Jan 9 Jan 17 Jan 28 - -

* This station data is available courtesy the National Climatic Data Center.

For each station, you will see a temperature along with a pile of percentage columns. Here's how it works: The percent column tells you the probability that you will experience that row's temperature on or before that date.

So, for example, in the Spring 32° row, if you have "Apr 15" under the 50% column, that means that you have a 50% chance of seeing frost on or before April 15th.

Another example. Say in the Fall 24° row, under 90%, you have Dec 1, then that means that you have a 90% chance of seeing 24 degrees on or before December 1st.

Empty cells indicate you have a less than 10% chance of ever seeing that temperature.


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