This data represents average monthly precipitation for Wisconsin from 1961 to 1990, and includes the layers 'precip1961_1990apr_a_wi', 'precip1961_1990aug_a_wi', 'precip1961_1990dec_a_wi', 'precip1961_1990feb_a_wi', 'precip1961_1990jan_a_wi', 'precip1961_1990jul_a_wi', 'precip1961_1990jun_a_wi', 'precip1961_1990mar_a_wi', 'precip1961_1990may_a_wi', 'precip1961_1990nov_a_wi', 'precip1961_1990oct_a_wi', 'precip1961_1990sep_a_wi'.[This dataset provides derived average monthly precipitation according to a model using point precipitation and elevation data for the 30-year period of 1961-1990.]