First and last freeze/frost dates for Rockport, WA ,United StatesFirst and last freeze/frost dates for:
Detailed station data* follows:
Concrete, WA (Skagit county):
|Spring 32°||Apr 29||Apr 22||Apr 16||Apr 12||Apr 8||Apr 3||Mar 30||Mar 24||Mar 17|
|Spring 28°||Mar 20||Mar 9||Mar 2||Feb 23||Feb 17||Feb 11||Feb 5||Jan 28||Jan 18|
|Spring 24°||Mar 1||Feb 20||Feb 14||Feb 8||Feb 3||Jan 28||Jan 22||Jan 14||Dec 31|
|Fall 32°||Oct 14||Oct 23||Oct 30||Nov 3||Nov 8||Nov 14||Nov 19||Nov 26||Dec 6|
|Fall 28°||Nov 2||Nov 11||Nov 18||Nov 24||Dec 1||Dec 6||Dec 12||Dec 19||Dec 28|
|Fall 24°||Nov 20||Dec 2||Dec 9||Dec 16||Dec 22||Dec 28||Jan 4||Jan 13||Jan 30|
Newhalem, WA (Whatcom county):
|Spring 32°||May 4||Apr 25||Apr 18||Apr 13||Apr 7||Apr 2||Mar 28||Mar 21||Mar 12|
|Spring 28°||Mar 22||Mar 12||Mar 5||Feb 27||Feb 21||Feb 15||Feb 9||Feb 2||Jan 23|
|Spring 24°||Mar 4||Feb 21||Feb 13||Feb 7||Jan 31||Jan 25||Jan 17||Jan 8||Dec 22|
|Fall 32°||Oct 20||Oct 27||Oct 31||Nov 4||Nov 8||Nov 12||Nov 16||Nov 21||Nov 28|
|Fall 28°||Oct 31||Nov 11||Nov 19||Nov 26||Dec 4||Dec 10||Dec 17||Dec 25||Jan 5|
|Fall 24°||Nov 14||Nov 24||Dec 3||Dec 10||Dec 16||Dec 23||Dec 30||Jan 8||Jan 26|
Diablo Dam, WA (Whatcom county):
|Spring 32°||May 6||Apr 30||Apr 26||Apr 22||Apr 19||Apr 15||Apr 12||Apr 8||Apr 2|
|Spring 28°||Apr 4||Mar 25||Mar 18||Mar 12||Mar 7||Mar 1||Feb 23||Feb 16||Feb 7|
|Spring 24°||Mar 9||Feb 28||Feb 22||Feb 17||Feb 12||Feb 7||Feb 1||Jan 26||Jan 17|
|Fall 32°||Oct 14||Oct 19||Oct 23||Oct 27||Oct 30||Nov 1||Nov 4||Nov 8||Nov 14|
|Fall 28°||Oct 28||Nov 4||Nov 10||Nov 15||Nov 20||Nov 25||Dec 1||Dec 7||Dec 16|
|Fall 24°||Nov 11||Nov 21||Nov 28||Dec 5||Dec 11||Dec 17||Dec 23||Dec 30||Jan 9|
* 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.