U.S. weather data

This compilation of weather data and climate normals is from ThreadEx stations. They make up the primary source of U.S. weather records. With greater length and more accuracy than most global weather data, NOAA has long been a leader in the field.

ThreadEx histories are comprised of multiple nearby locations, “threaded” to create a full record to the late 1800s in many instances.

There are currently 425 locations in this group. Bolded city names are daily climate information for the period beginning the year in parentheses.

CSV data files will be updated during the first week 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

Data source is the Applied Climate Information System. The full list of ThreadEx stations includes additional detail on period of record. (last archived: June 2025)