Solar Irradiance

Also available in PDF.

Data source: For 1976/01/05 to 2003/02/28 Physikalisch Meteorologisches Observatorium Davos, World Radiation Center and for 2003/03/01 to 2015/04/26 University of Colorado Solar Radiation & Climate Experiment. Data are matched using the 2003/03/01 to 2004/02/29 period. (Last modified: 2015/05/03)

Long-Term Sunspot Numbers

Also available in PDF. Data source: SIDC - Solar Influences Data Analysis Center (Data are through April 2015, Last modified: 2015/05/03)

For daily sunspot numbers see NOAA page or page