This compilation of weather data and normals is from ThreadEx weather stations. They are the primary source of U.S. weather records.
ThreadEx stations are comprised of multiple nearby stations, “threaded” to create a full record to the late 1800s in many instances. There are currently 425 locations in this group.
All files are in CSV format. Bolded city names are daily climate information for the period beginning the year in parentheses and will be updated around the start of each month.
Eastern | Southern | Central | Western | Alaska | Pacific
Top 30 U.S. cities
New York City (1869). norms: month, day
Los Angeles (1944). norms: month, day
Chicago (1871). norms: month, day
Houston (1888). norms: month, day
Phoenix (1895). norms: month, day
Philadelphia (1871). norms: month, day
San Antonio (1885). norms: month, day
San Diego (1850). norms: month, day
Dallas (1898). norms: month, day
Jacksonville (1871). norms: month, day
Austin (1897). norms: month, day
Ft. Worth (1898). norms: month, day
San Jose (1893). norms: month, day
Columbus (1878). norms: month, day
Charlotte (1878). norms: month, day
Indianapolis (1871). norms: month, day
San Francisco (1945). norms: month, day
Seattle (1945). norms: month, day
Denver (1872). norms: month, day
Oklahoma City (1890). norms: month, day
Nashville (1871). norms: month, day
Washington (1871). norms: month, day
El Paso (1887). norms: month, day
Las Vegas (1937). norms: month, day
Boston (1872). norms: month, day
Detroit (1874). norms: month, day
Portland (1940). norms: month, day
Louisville (1872). norms: month, day
Memphis (1875). norms: month, day
Baltimore (1871). norms: month, day