Forebay water temperatures are graphed from April 1 through August 31.
This graph compares the daily forebay water temperature averages for the current year, last year, ten year average, and eight other years.
The data on these pages are from the Army Corps of Engineers' Total Dissolved Gas Fixed Monitoring Stations (TDGFMS). Click here for metadata about the TDGFMS.
This query graphs average daily forebay water temperature from four TDGFMS sites: BON - Bonneville Dam Forebay Monitor (BON - TDGFMS code); MCN - McNary Dam Forebay Monitor (MCNA - TDGFMS code); IHR - Ice Harbor Dam Forebay Monitor (IHRA - TDGFMS code); and LGR - Lower Granite Dam Forebay Monitor (LWG - TDGFMS code).
Page design last updated on: May 16, 2016