This README file is associated with data and analyses from publication "Quantification of thermal impacts across freshwater life stages to improve temperature management for anadromous salmonids", by FitzGerald & Martin, 2022, Conservation Physiology. This DRYAD dataset contains three .csv files (daily stream temperature predictions along each river) and an R script to replicate the results from our paper. The three stream temperature files are: ClearCreek_streamtemp.csv, StanislausR_streamtemp.csv, and TuolumneR_streamtemp.csv. Each .csv has the same format: the first column is river km (0 represents the mouth of the river), and the rest of the .csv shows predicted stream temperature (degrees Celsium) at that river km (first row) on that date (column header). 'NA' indicates no stream temperature prediction due to a lack of data. For our study, we examined temperatures in 2013-2014, but here we include all predicted temperatures for other research. Clear Creek daily stream temperature spans from 1-Jan-2002 to 1-Nov-2015, Stanislaus River daily stream temperature spans from 1-Jan-1993 to 31-Dec-2014, and Tuolumne River daily stream temperature spans from 1-Jan-1993 to 31-Dec-2014; ranges vary due to differences in data availability. We provide an R script (ThermalEffects_R.R) so that users can replicate our results or modify this script for future research. The code is written to replicate results for Clear Creek spring-run Chinook salmon. To replicate results from other rivers, the user will need to upload the new stream temperature dataset and alter the time period of interest (code lines 15-18), and change the salmon phenology and spatial distributions for the appropriate population (code lines 40-48).