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First and last freeze/frost dates for Woodbury, CT, United States

 
Each winter, on average, your risk of frost is from September 27 through May 16.

Almost certainly, however, you will receive frost from October 11 through May 1.

You are almost guaranteed that you will not get frost from June 1 through September 13.

Your frost-free growing season is around 134 days.

Detailed station data* follows:

Falls Village, CT (Litchfield county):

Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
Spring 32° Jun 1 May 27 May 23 May 19 May 16 May 13 May 10 May 6 May 1
Spring 28° May 14 May 10 May 7 May 5 May 2 Apr 30 Apr 27 Apr 24 Apr 20
Spring 24° Apr 29 Apr 25 Apr 22 Apr 19 Apr 16 Apr 14 Apr 11 Apr 8 Apr 3
Fall 32° Sep 13 Sep 18 Sep 22 Sep 24 Sep 27 Sep 30 Oct 3 Oct 6 Oct 11
Fall 28° Sep 22 Sep 28 Oct 1 Oct 5 Oct 8 Oct 11 Oct 14 Oct 18 Oct 23
Fall 24° Oct 7 Oct 12 Oct 16 Oct 18 Oct 21 Oct 24 Oct 27 Oct 30 Nov 3

Norfolk 2 Sw, CT (Litchfield county):

Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
Spring 32° May 23 May 19 May 15 May 12 May 10 May 7 May 4 May 1 Apr 26
Spring 28° May 8 May 4 May 1 Apr 28 Apr 26 Apr 23 Apr 20 Apr 17 Apr 13
Spring 24° Apr 23 Apr 19 Apr 16 Apr 14 Apr 12 Apr 10 Apr 8 Apr 5 Apr 1
Fall 32° Sep 20 Sep 25 Sep 29 Oct 2 Oct 5 Oct 7 Oct 10 Oct 14 Oct 19
Fall 28° Oct 3 Oct 8 Oct 11 Oct 14 Oct 17 Oct 19 Oct 22 Oct 26 Oct 30
Fall 24° Oct 18 Oct 23 Oct 27 Oct 30 Nov 1 Nov 4 Nov 7 Nov 11 Nov 16

Shepaug Dam, CT (Litchfield county):

Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
Spring 32° May 18 May 14 May 11 May 8 May 6 May 4 May 1 Apr 28 Apr 24
Spring 28° May 2 Apr 28 Apr 26 Apr 23 Apr 21 Apr 19 Apr 16 Apr 14 Apr 10
Spring 24° Apr 20 Apr 15 Apr 12 Apr 10 Apr 7 Apr 5 Apr 2 Mar 30 Mar 26
Fall 32° Sep 22 Sep 27 Sep 30 Oct 3 Oct 5 Oct 8 Oct 11 Oct 14 Oct 19
Fall 28° Oct 1 Oct 6 Oct 10 Oct 13 Oct 16 Oct 19 Oct 22 Oct 26 Oct 31
Fall 24° Oct 16 Oct 22 Oct 26 Oct 29 Oct 31 Nov 3 Nov 7 Nov 11 Nov 16

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

For each weather station, you will see a temperature along with tables of data organized into percentage columns. The percentage column tells you the probability that you will experience that row’s temperature on or near that date. Here are two examples to help you determine your probable last frost and first freeze dates.

Example 1 (Last Frost). In the Spring 32° row, if you have “Apr 15” under the 50% column, that means you have a 50% chance of seeing frost on or before April 15th.

Example 2 (First Freeze). In the Fall 24° row, if you have “Dec 1” under the 90% column, that means you have a 90% chance of seeing 24 degrees on or after December 1st.

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

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