Water temperature data collected from North Callahan and Trail Creeks in northern Idaho using HOBO Tidbit temperature loggers. Data is recorded at 15-minute intervals in degrees Celsius. Five sites are included within the dataset: two sites from North Callahan Creek (Upper and Lower) and three sites from Trail Creek (Lower, Upper-Below Bridge, Upper-Above Bridge). Temporal range of data collection and geographic coordinates for each site is as follows:     North Callahan Lower | Oct 2020 to Sep 2021 | 48.455278    -116.100058     North Callahan Upper | Oct 2020 to Sep 2021 | 48.469728    -116.136611     Trail Lower | Oct 2020 to Sep 2021 | 48.558403    -116.362633     Trail Upper-Below Bridge | Jul 2019 to Sep 2020 | 48.54793    -116.360978     Trail Upper-Above Bridge | Oct 2020 to Aug 2021 | 48.545795    -116.360428 Data contents include raw and cleaned data files (.csv), and georeferenced images (jpeg) for all 5 sites. Raw data files include all downloaded data. Cleaned data files have pre- and post-deployment records removed, and datetimes have been transformed into ISO8601 format as described below.