Systems and methods are disclosed to downscale the resolution of a coarse-resolution soil moisture data. Coarse-resolution soil moisture data may include data cells that each represent a geographic region having at least one dimension greater than or equal to 1 km. A plurality of fine-resolution supplemental soil moisture data may be received that includes at least one of soil data, vegetation data, topography data, and climate data. The fine-resolution supplemental soil moisture data comprising data cells that each represent a geographic region having at least one dimension less than or equal to 100 meters. The coarse-resolution soil moisture data may be downscaled to fine-resolution soil moisture data using the plurality of fine-resolution supplemental soil moisture data, the fine-resolution soil moisture data comprising data cells that each represent a geographic region having at least one dimension less than 100 meters.