Here is a look at some Christmas Day weather statistics for Dayton, with data going back to 1893. As can be seen in the data below, there has been a fairly wide spectrum of temperatures and precipitation on Christmas in Dayton, but high temperatures have generally been in the 30s and low temperatures in the 20s. While it is not uncommon for the area to see a small amount of precipitation on Christmas Day, only a small fraction of Christmas Days in Dayton have had measurable snowfall. Scroll to the bottom of the page to find out how common a white Christmas is in the Dayton area.
Christmas Day Climate Extremes (1893-2014):
Warmest High Temperature: 65 degrees (1893)
Coldest High Temperature: -1 degrees (1983)
Coldest Low Temperature: -13 degrees (1983)
Warmest Low Temperature: 54 degrees (1895)
Most Precipitation: 0.82 inches (1957)
Most Snowfall: 5.2 inches (1909)
Greatest Snow Depth: 16 inches (2004)
Christmas Day Climate Averages (1893-2014):
Average High Temperature: 36 degrees
Average Low Temperature: 22 degrees
Average Precipitation: 0.09 inches
Average Snowfall: 0.3 inches
Average Snow Depth: 1 inch
Below are graphs showing the frequency distribution of Christmas Day high/low temperatures, precipitation, and snowfall for Dayton. Click here for a full listing of Dayton's Christmas Day climate records.
A "white Christmas" is defined as having an inch or more of snow on the ground on Christmas morning. How common is that in the Dayton area? Since regular snow depth measurements began in Dayton in 1943, the area has experienced a white Christmas 21 times (about 29 percent of the time). During the most recent 30-year climatological normal period (1981-2010), the area experienced a white Christmas 9 times (30 percent of the time). Dayton's most recent white Christmas occurred in 2010 when there was 2 inches of snow on the ground in the morning.
The white Christmas probability map below (click for larger version) was created by NOAA's National Centers for Environmental Information (NCEI) and incorporates data from observing stations with at least 25 years or more of snow depth measurements during the period 1981-2010.