Welcome

The function of the State Climatologist is to collect, disseminate, and interpret climate data. This website provides links to sources of climate data and seasonal forecasts for the state of Washington. Most data on the site are available for free; a charge may apply for additional data or interpretation, or for testimony in a legal case.

The Office of Washington State Climatologist (OWSC) is called by the State of Washington to serve as a credible and expert source of climate and weather information for state and local decision makers and agencies working on drought, flooding, climate change, and other related issues. When interpreting climate information or analysis, OWSC will rely foremost on peer-reviewed literature and on best practices, sometimes consulting with other experts as needed, and is willing to revise public statements in light of solid new analysis or information. Our on-going goal is to provide information to the public that is reliable and meets the highest quality standards.

You can also use this site to access our most popular tools like the NW Climate Trends, Snow Depth, and Cloud Cover. A complete list of tools, as well as links to quality outside data sources, can be found in Climate Data.