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.
Over the course of the year, the temperature in Walla Walla typically varies from 30Â°F to 93Â°F and is rarely below 17Â°F or above 102Â°F. The hot season lasts for 84 days, from June 19 to September 11, with an average daily high temperature above 82Â°F. The hottest day of the year is July 31, with an average high of 93Â°F and low of 65Â°F.