In materials science, quenching is the rapid cooling of a workpiece in water, oil or air to obtain certain material properties. A type of heat treating, quenching prevents undesired low-temperature processes, such as phase transformations, from occurring. It does this by reducing the window of time during which these undesired reactions are both thermodynamically favorable, and kinetically accessible; for instance, quenching can reduce the crystal grain size of both metallic and plastic material
The length of the day in Walla Walla varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 38 minutes of daylight; the longest day is June 21, with 15 hours, 46 minutes of daylight.
The highest monthly average temperature in Walla Walla for July is 78 degrees. The lowest monthly average temperature in Walla Walla for December is 32 degrees. The most monthly precipitation in Walla Walla occurs in November with 2.5 inches. The air quality index in Walla Walla is 312% worse than the national average. The pollution index in Walla Walla is 86% better than the national average.