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First and last freeze/frost dates for Chambersburg, PA ,United States

First and last freeze/frost dates for:
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Each winter, on average, your risk of frost is from October 19 through April 19.

Almost certainly, however, you will receive frost from November 2 through April 8.

You are almost guaranteed that you will not get frost from May 1 through October 4.

Your frost-free growing season is around 183 days.

Detailed station data* follows:

Shippensburg, PA (Franklin county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° May 1 Apr 27 Apr 24 Apr 22 Apr 19 Apr 17 Apr 15 Apr 12 Apr 8
Spring 28° Apr 22 Apr 17 Apr 14 Apr 12 Apr 9 Apr 7 Apr 4 Apr 1 Mar 28
Spring 24° Apr 9 Apr 4 Apr 1 Mar 30 Mar 27 Mar 25 Mar 22 Mar 19 Mar 15
Fall 32° Oct 4 Oct 9 Oct 13 Oct 16 Oct 19 Oct 22 Oct 26 Oct 29 Nov 2
Fall 28° Oct 18 Oct 23 Oct 26 Oct 29 Oct 31 Nov 2 Nov 5 Nov 8 Nov 12
Fall 24° Oct 28 Nov 1 Nov 5 Nov 9 Nov 12 Nov 15 Nov 19 Nov 23 Nov 28

Bloserville 1 N, PA (Cumberland county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° May 11 May 5 Apr 30 Apr 26 Apr 23 Apr 19 Apr 16 Apr 11 Apr 5
Spring 28° Apr 25 Apr 20 Apr 17 Apr 14 Apr 11 Apr 8 Apr 5 Apr 1 Mar 27
Spring 24° Apr 11 Apr 6 Apr 2 Mar 30 Mar 27 Mar 24 Mar 20 Mar 17 Mar 11
Fall 32° Oct 2 Oct 8 Oct 12 Oct 16 Oct 19 Oct 23 Oct 26 Oct 30 Nov 4
Fall 28° Oct 17 Oct 22 Oct 26 Oct 29 Oct 31 Nov 3 Nov 7 Nov 11 Nov 16
Fall 24° Oct 26 Nov 2 Nov 7 Nov 11 Nov 15 Nov 19 Nov 24 Nov 29 Dec 7

Chambersburg 1 Ese, PA (Franklin county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° May 12 May 7 May 3 Apr 30 Apr 27 Apr 24 Apr 21 Apr 18 Apr 12
Spring 28° Apr 23 Apr 19 Apr 16 Apr 14 Apr 12 Apr 9 Apr 7 Apr 4 Mar 31
Spring 24° Apr 14 Apr 9 Apr 5 Apr 1 Mar 29 Mar 26 Mar 23 Mar 19 Mar 13
Fall 32° Oct 1 Oct 6 Oct 10 Oct 14 Oct 17 Oct 20 Oct 23 Oct 27 Oct 31
Fall 28° Oct 11 Oct 16 Oct 20 Oct 23 Oct 26 Oct 29 Oct 31 Nov 4 Nov 9
Fall 24° Oct 21 Oct 28 Oct 31 Nov 4 Nov 8 Nov 11 Nov 15 Nov 20 Nov 26

* 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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