[This nonGeographicDataset is embargoed until June 30, 2026]. This dataset contains population and trait dynamic and life history data of the host organism Indian meal moth Plodia interpunctella, and its parasitoide wasp Venturia canescens in response to temperature changes, from an 18-month microcosm experiment. Variables in this dataset include weekly dead adult count of hosts or parasitoids, leg length (proxy to adult body size), and multi-variate life history measures (survival, development time, sizes). During the experiment, lines of hosts, with or without parasitoids, were exposed to gradual increases in temperature at either +2 or +4 degrees celsius over 18 months, in the presence or absence of stochastic fluctuations. This dataset was created as part of a study to investigate the impact of long-term climate warming on generational multispecies interactions, The data will be beneficial for any studies related to population cycles, long-term dynamics, density-dependence responses and climate change projection. Full details about this nonGeographicDataset can be found at https://doi.org/10.5285/e5958a3f-af7a-4d90-abd7-eeaba98aca8b