This dataset contains temperature data taken from 11 streams or rivers in Forillon National Park since 2008. Temperature data are collected hourly by a HOBO probe installed on the watercourse’s bottom in June and removed in September or October. For each watercourse studied, the temperature probe is installed at the benthic invertebrate community sampling site (CABIN) close to the site at which the electrofishing is carried out. Temperature data are particularly useful for assessing the quality of brook trout aquatic ecosystems in Forillon National Park.