The effect of climate change has already been seen in many ecological systems, but incorporating studies of parasites is vital to fully understand how ecological communities as a whole will respond. We used a meta-analytic approach to assess the role of climatic perturbation on parasite development, abundance and fecundity. Development increased with a temperature increase, but decreased as humidity increased under constant temperature. Abundance also increased, yet fecundity decreased with temperature changes. Our results demonstrate that these aspects of parasite fitness have a complex relationship with the climate, suggesting that future responses to global climate change will be difficult to predict