The data in the table was provided from 1922 to 1993 by the various people who worked for the National Weather Service office in Wenatchee, for the fruit growers and public. Since the office was closed in 1993, the date of full bloom is being monitored at the WSU Tree Fruit Research and Extension Center by the Extension agent from the Chelan/Douglas County office of WSU Extension. These data are of both significant historical and practical importance, and are used by various individuals to better understand production, harvest and quality of the past crops produced in the region.

Full bloom is defined as 60% blossoms open on the North side of the tree. The average date of full bloom at this site is April 27.

Some Fun Facts:
As of 2005, the 84 year average full bloom date in Wenatchee is: April 27 at 6:34 p.m.

The Average Full Bloom Date From 1995-2005 is: April 23 at 9:49 p.m.
The Average Full Bloom Date From 1990-1999 is: April 21 at 7:12 a.m.
1980-89: April 25 at 9:36 p.m.
1970-79: April 30 at noon.
1960-69: April 28 at 7:12 p.m.
1950-59: May 2 at 11:59 p.m..
1940-49: April 26 at 9:36 a.m.
1930-39: April 26 at 9:36 a.m.