President-elect Donald Trump's inauguration on Monday is forecast to be the coldest in 40 years.
An arctic front will pass by Washington, D.C., on Sunday night and winds will pick up out of the northwest, ushering in arctic air.
MORE: Michelle Obama to skip Trump inaugurationMonday's temperature will be at its highest -- about 25 degrees -- when the clock strikes Inauguration Day at midnight. Throughout the course of the day, the temperature will slowly fall.
When Trump is sworn in at noon, the temperature will be about 18 or 19 degrees. Due to the wind, the wind chill -- what temperature it feels like -- will be between 5 and 10 degrees.
MORE: Johnson says flags will be raised for Trump’s inaugurationBy 7 p.m., when the inauguration balls begin, the temperature will be near 13 degrees with a wind chill of minus 1.
The coldest January Inauguration Day on record was 1985 for President Ronald Reagan's second inauguration.
MORE: How to stay safe in the coldThe temperature that morning fell to a low of 4 degrees below zero. The temperature was just 7 degrees at noon, moving Reagan's swearing-in ceremony inside and canceling the parade.
The daytime high was only 17 degrees.
The warmest January inauguration was also for Reagan, in 1981, at a balmy 55 degrees.
The warmest inauguration ever was 89 degrees on Aug. 9, 1974, when President Gerald Ford was sworn in following President Richard Nixon's resignation.
Inaugurations used to be held in March until the 20th Amendment was ratified in 1933, stating that the president's term began at noon on Jan. 20.
One of the most memorable January inaugurations was President John F. Kennedy's in 1961. A snowstorm struck D.C. the night before, and the 8 inches of snow forced people to ditch their cars and created a massive traffic jam.