The Comparative Climatic Data (CCD-2018) tables serve as a comprehensive resource for examining climate conditions across major weather observing stations in the U.S., Puerto Rico, and the Pacific Islands. This publication, crucial for climate analysis, compiles meteorological data from active and comparable former sites. To ensure data reliability, only stations with at least three years of operational data are included in these observed data tables. This data is also integral to the Normals, Means, and Extremes table found within the Local Climatological Data Annual Summary for individual stations.
Data Tables: A Comparative Overview
Organized alphabetically by state, the station listings within the CCD-2018 tables are designed for straightforward comparison. Users can easily analyze values for various locations within a single table, focusing on specific meteorological elements. It’s important to note that tables may omit certain elements for weather stations that do not consistently report them. Asterisks (*) within the tables indicate an average frequency of occurrence that is greater than zero but less than one-half, providing additional nuance to the Comparative Mean data presented.
Important Notes on Data Usage
It’s crucial to acknowledge that some data within the CCD-2018 is based on exchanges under the World Meteorological Organization (WMO) World Weather Watch Program, governed by WMO Resolution 40 (Cg-XII). This resolution allows WMO member countries to impose restrictions on the commercial use or re-export of their data outside the receiving country. Consequently, while the data summaries and products available here are intended for free and unrestricted use in non-commercial activities such as research and education, specific limitations apply. For data pertaining to non-U.S. locations, redistribution to other users or use in commercial services for re-export is prohibited.
