NOAA Climate.gov provides timely and authoritative scientific data and information about climate science, adaptation, and mitigation. Their goals are to promote public understanding of climate science and climate-related events, to make NOAA data products and services easy to access and use, to provide climate-related support to the private sector and economy, and to serve people making climate-related decisions with tools and resources that help them answer specific questions.
Link: NOAA Climate.gov