The monthly mean minimum and maximum temperatures over the year in Stockholm, Sweden. Show the average temperatures in Stockholm in Celsius Â» Data from nearest weather station: Stockholm, Sweden (0.0 Miles).
The postal service started the use of postal zones for large cities in 1943. By the early 1960s a more general system was needed. On July 1, 1963, ZIP codes were created for the whole country but they were not mandatory. In 1967, these were made mandatory for many types of mail. The system was soon used for all mail.
The ZIP Code program expanded the code to 5 digits and extended it nationwide. Implemented by the U.S. Post Office Department in 1963, the ZIP Code uses a 5-digit code to identify the individual community post offices or, in large urban areas with multiple post offices, delivery stations in metropolitan areas associated with a given address.