Supplementary Materials to: Allen, S. T., Jasechko, S., Berghuijs, W. R., Welker, J. M., Goldsmith, G. R., and Kirchner, J. W.: Global sinusoidal seasonality in precipitation isotopes, Hydrol. Earth Syst. Sci. 2019. https://doi.org/10.5194/hess-2019-61. Please cite the above manuscript when using these resources. These files are all global maps at 5-minute resolution, spanning all longitudes and latitudes from 60 degrees south to 90 degrees north. See the methods section of the manuscript for more details. Precipitation δ18O amplitude (‰) Precipitation δ18O phase (day of peak value, in days from the summer solstice) Precipitation δ18O offset (‰) Precipitation δ2H amplitude (‰) Precipitation δ2H phase (day of peak value, in days from the summer solstice) Precipitation δ2H offset (‰) Precipitation amount amplitude (mm month-1) Precipitation amount phase (day of peak value, in days from the summer solstice) Precipitation amount offset (mm month-1)