Dataset was generated by performing water-balance computations for the Upper Colorado River Basin for the months October 1913 through September 2017. The basin area was first divided into 17,626 4-kim grid cells, and these were then grouped by sub-basin and annual precipitation into 960 subareas; the dataset includes a lookup table for this grouping. For each of the 960 subareas, the dataset gives the model's estimates of rainfall, snowfall, albedo, net radiation, snowmelt, potential evapotranspiration, actual evapotranspiration, total runoff, snow-water equivalent, soil-water storage, groundwater storage, and air temperature.