This dataset contains 19 World Clim variables collected for the latitudes and longitudes associated with 120 accessions within the Mimulus guttatus species complex. Latitude, longitude, elevation, species identification and annual/perennial status of accessions are also given. The dataset also includes morphological and flowering time data collected from a common garden experiment in which all 120 accessions were grown concurrently under 16-hour days in the Duke University greenhouses. Data include the number of days until flowering post germination, length of the second internode, length and width of the first leaf, length and width of the first flower, diameter between first and second true leaves, number of leaf pairs upon flowering, and the presence or absence of anthocyanin calyx spots.