Is that your answer? Pathetic is mine!!
The U.S. Climate Reference Network (USCRN) is a systematic and sustained network of climate monitoring stations with sites across the contiguous U.S., Alaska, and Hawaii. These stations use high-quality instruments to measure temperature, precipitation, soil conditions, and more. USCRN provides a continuous series of climate observations to monitor national climate trends and support climate-impact research.
The USCRN is made up of over 143 stations in the United States . Its purpose is to maintain a sustainable high quality network which will detect, with high confidence, signals of climate change in the US.[1] It provides the United States with a reference network that meets the requirements of the Global Climate Observing System.
The primary goal of the USCRN is to provide future long-term high-quality observations of surface air temperature and precipitation that can be coupled to past long-term observations for the detection and attribution of present and future climate change. It records data with minimal time dependent biases affecting the interpretation of decadal to centennial climate variability and change.
https://www.ncei.noaa.gov/products/land-based-station/us-climate-reference-network