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First and last freeze/frost dates for Houston, 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 29 through March 1.

Almost certainly, however, you will receive frost from December 25 through January 31.

You are almost guaranteed that you will not get frost from March 30 through November 4.

Your frost-free growing season is around 273 days.

Detailed station data* follows:

Houston Wsmo Ap, TX (Harris county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° Mar 30 Mar 20 Mar 13 Mar 7 Mar 1 Feb 23 Feb 17 Feb 10 Jan 31
Spring 28° Mar 10 Feb 25 Feb 16 Feb 8 Jan 31 Jan 24 Jan 16 Jan 6 Dec 22
Spring 24° Feb 14 Feb 3 Jan 25 Jan 17 Jan 8 Dec 26 - - - - - -
Fall 32° Nov 4 Nov 12 Nov 19 Nov 24 Nov 29 Dec 5 Dec 10 Dec 16 Dec 25
Fall 28° Nov 23 Dec 2 Dec 8 Dec 13 Dec 18 Dec 23 Dec 28 Jan 4 Jan 14
Fall 24° Dec 7 Dec 19 Dec 28 Jan 5 Jan 15 Jan 29 - - - - - -

Conroe, TX (Montgomery county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° Mar 20 Mar 13 Mar 8 Mar 3 Feb 27 Feb 23 Feb 19 Feb 13 Feb 6
Spring 28° Mar 17 Mar 5 Feb 24 Feb 16 Feb 9 Feb 2 Jan 25 Jan 15 Dec 31
Spring 24° Feb 28 Feb 15 Feb 5 Jan 27 Jan 18 Jan 7 Dec 17 - - - -
Fall 32° Nov 1 Nov 9 Nov 14 Nov 19 Nov 24 Nov 28 Dec 4 Dec 9 Dec 17
Fall 28° Nov 13 Nov 23 Nov 29 Dec 6 Dec 11 Dec 17 Dec 23 Dec 30 Jan 10
Fall 24° Dec 2 Dec 15 Dec 24 Jan 2 Jan 11 Jan 24 - - - - - -

Sugar Land, TX (Fort Bend county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° Mar 18 Mar 7 Feb 28 Feb 21 Feb 15 Feb 8 Feb 2 Jan 25 Jan 14
Spring 28° Mar 2 Feb 17 Feb 8 Jan 31 Jan 23 Jan 14 Jan 3 Dec 14 - -
Spring 24° Feb 12 Feb 2 Jan 24 Jan 17 Jan 9 Dec 29 - - - - - -
Fall 32° Nov 9 Nov 19 Nov 27 Dec 4 Dec 10 Dec 16 Dec 22 Dec 30 Jan 9
Fall 28° Nov 27 Dec 6 Dec 12 Dec 18 Dec 24 Dec 30 Jan 7 - - - -
Fall 24° Dec 13 Dec 25 Jan 3 Jan 12 Jan 22 Feb 5 - - - - - -

* 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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