From the Sun's print edition:
Baltimore Sun librarian Paul McCardell offers this post:
Miss the cold? The coldest recorded temperature in Maryland was 100 years ago on Jan. 13, 1912, in Oakland at -40 degrees Fahrenheit. It was recorded by a U.S. Weather Bureau reader named Ralph E. Weber of Oakland. On that date in Baltimore, it was 0. That January and February, Maryland was hit by one cold wave after another. Three other states share a record temperature of -40: Arizona set in 1971 and Kansas and Missouri set on same day in 1905. Alaska is the state with the coldest recorded temperature, a low of -80 recorded Jan. 23, 1971.