Continuous water-temperature data were collected at multiple restoration sites along the Middle Fork and mainstem Willamette Rivers between Jasper and Newberg, Oregon, to support effectiveness monitoring for a large-scale channel and floodplain restoration initiative (Willamette Focused Investment Partnership, WFIP). Continuous water-temperature loggers were deployed at a subset of WFIP sites where river restoration activities were planned or implemented to improve habitat conditions for native fish species. Data from water-temperature monitoring will be used to evaluate the effectiveness of restoration activities at improving habitat conditions for native fish in the Willamette River. Additionally, water-temperature monitoring in summer and early fall months at restoration sites are useful for determining whether thermal conditions at these sites are optimal, sub-optimal, or lethal for cold-water adapted Endangered Species Act (ESA)-listed salmonids like spring Chinook salmon (Oncorhynchus tshawytscha). Water-temperature monitoring for this study spans 2019 through 2022. Water-temperature loggers were suspended in the water column on a wire between a concrete block and a buoy as part of a monitoring arrays installed at multiple off-channel location throughout the study area. This document describes water-temperature data collected at the Snag Boat Bend Unit of the William L. Finley National Wildlife Refuge (Snag Boat Bend) monitoring site between 07/23/2021 and 10/20/2022 and associated data quality files. Several monitoring sites were located within off-channel water features adjacent to the Willamette River and included various configurations of water-temperature loggers suspended in the water column. One monitoring array consisting of one water-temperature logger was deployed from 07/31/2022 to 10/20/2022 within a perennially connected alcove in the northwestern region of the site (referred to as “Cutthroat”). Two monitoring arrays consisting of two water-temperature loggers each were deployed from 07/31/2021 to 10/20/2022 within a perennially connected alcove in the central and north regions of the site near Porter Dam (referred to as “Porter1” and “Porter 2”). One monitoring array consisting of two water-temperature loggers was deployed from 07/31/2021 to 3/10/2022 and 8/4/2022 to 10/20/2022 within a perennially connected alcove in the northeastern region of the site (referred to as “Lake Creek”). One monitoring array consisting of one water-temperature logger was deployed from 07/23/2021 to 10/20/2022 within a perennially connected stream in the eastern region of the site (referred to as “Upper Lake”). These data and metadata have been added to the data release originally published in 2021.