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First and last freeze/frost dates for Natick, MA ,United States

First and last freeze/frost dates for:
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Each winter, on average, your risk of frost is from October 7 through May 1.

Almost certainly, however, you will receive frost from October 19 through April 21.

You are almost guaranteed that you will not get frost from May 12 through September 25.

Your frost-free growing season is around 159 days.

Detailed station data* follows:

Bedford, MA (Middlesex county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° May 12 May 8 May 6 May 3 May 1 Apr 29 Apr 27 Apr 24 Apr 21
Spring 28° Apr 26 Apr 22 Apr 20 Apr 17 Apr 15 Apr 13 Apr 10 Apr 8 Apr 4
Spring 24° Apr 15 Apr 11 Apr 8 Apr 5 Apr 2 Mar 31 Mar 28 Mar 25 Mar 20
Fall 32° Sep 25 Sep 29 Oct 2 Oct 5 Oct 7 Oct 10 Oct 12 Oct 15 Oct 19
Fall 28° Oct 6 Oct 10 Oct 14 Oct 16 Oct 19 Oct 22 Oct 24 Oct 28 Oct 31
Fall 24° Oct 16 Oct 22 Oct 26 Oct 30 Nov 1 Nov 5 Nov 8 Nov 12 Nov 18

Lowell, MA (Middlesex county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° May 10 May 6 May 3 May 1 Apr 28 Apr 26 Apr 23 Apr 20 Apr 16
Spring 28° May 1 Apr 27 Apr 24 Apr 22 Apr 20 Apr 18 Apr 15 Apr 12 Apr 9
Spring 24° Apr 15 Apr 12 Apr 9 Apr 7 Apr 4 Apr 2 Mar 31 Mar 28 Mar 25
Fall 32° Sep 24 Sep 29 Oct 3 Oct 6 Oct 9 Oct 12 Oct 15 Oct 19 Oct 24
Fall 28° Oct 3 Oct 9 Oct 14 Oct 18 Oct 21 Oct 25 Oct 29 Nov 1 Nov 8
Fall 24° Oct 23 Oct 28 Oct 31 Nov 3 Nov 6 Nov 9 Nov 13 Nov 17 Nov 22

Worcester Wso Ap, MA (Worcester county):

Temperature10%20%30%40%50%60%70%80%90%
Spring 32° May 7 May 3 May 1 Apr 28 Apr 26 Apr 24 Apr 22 Apr 19 Apr 15
Spring 28° Apr 23 Apr 20 Apr 17 Apr 15 Apr 13 Apr 11 Apr 9 Apr 7 Apr 3
Spring 24° Apr 16 Apr 11 Apr 8 Apr 5 Apr 3 Mar 31 Mar 28 Mar 25 Mar 20
Fall 32° Sep 29 Oct 4 Oct 8 Oct 11 Oct 14 Oct 17 Oct 20 Oct 24 Oct 29
Fall 28° Oct 8 Oct 14 Oct 18 Oct 22 Oct 25 Oct 28 Oct 31 Nov 4 Nov 10
Fall 24° Oct 26 Oct 31 Nov 3 Nov 7 Nov 10 Nov 13 Nov 16 Nov 20 Nov 25

* 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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