University of Washington

Sacramento River Water Temperature Threshold Analysis

Ecological Thresholds Queries
Clear Creek Lower American River Sacramento River Stanislaus River

Actual pre-season and in-season management decision processes are complex employing multiple sources of observed data, models, and forecasts. For further information, see the Threshold Analysis Criteria section.

Note: Years prior to 2019 pre-date the Reclamation Proposed Action and are provided for historical perspective on conditions.
line plot 2026 Sacramento River Water Temp (°F)
2026 Sacramento River Water Temperature (°F) at multiple locations from Keswick Dam to Bend Bridge. Preliminary data from CDEC; subject to revision. 7 Day Average Daily Maximum (7DADM) calculations and figure generated by SacPAS.
Central Valley Operations Office, USBR: 2026 Northern CVP Water Temperature Report (PDF), with Sacramento River temperatures and flows, temperature control point, and Lake Shasta Isothermalbaths. File modified: April 28 2026 07:59:05.
Central Valley Operations Office, USBR: 2026 Shasta Temperature Control Device (TCD) Configuration (PDF) with gate change operations, elevation, and temperatures. File modified: April 27 2026 12:59:05.
Shasta Temperature Control Device (TCD) Change Dates
Start Date End Date
4/27/2026 Current
4/16/2026 4/27/2026
4/16/2026 4/27/2026
3/24/2026 4/16/2026
3/24/2026 4/16/2026
3/11/2026 3/24/2026
3/11/2026 3/24/2026
3/3/2026 3/11/2026
3/3/2026 3/11/2026
1/12/2026 3/3/2026
1/12/2026 3/3/2026
1/12/2026 3/3/2026
1/8/2026 1/12/2026
12/11/2025 1/8/2026

No 2026 data during target period, 5/15-10/31.

No 2026 data during target period, 5/15-10/31.

No 2026 data during target period, 5/15-10/31.

No 2026 data during target period, 5/15-10/31.

No 2026 data during target period, 5/15-10/31.

line plot water temperature all sites and Reservoir Data
2026 Sacramento River Daily Average Water Temperature. Temperature Locations from Keswick Dam to Bend Bridge. Shasta and Keswick Reservoir Storage in MAF and Outflow in TCFS. Preliminary data from CDEC; subject to revision. Figure generated by SacPAS.
line plot Daily Max and 7DADM select sites
2026 Sacramento River Water Temperature. Daily Maximum and 7 Day Average Daily Maximum (7DADM) for SR Upstream of Hwy 44 (SAC) and SR abv Clear Creek (CCR). Preliminary data from CDEC; subject to revision. 7DADM calculations and figure generated by SacPAS.
download CSV  
2026 Sacramento River Temperature Data Table, Threshold Period 5/15/ - 10/31
Date Source Shasta
Storage
(MAF)		 Shasta
Outflow
(TCFS)		 Keswick
Outflow
(TCFS)		 KWK DAT WTemp °F SAC DAT WTemp °F CCR DAT WTemp °F BSF DAT WTemp °F JLF DAT WTemp °F BND DAT WTemp °F KWK 7DADM WTemp °F SAC 7DADM WTemp °F CCR 7DADM WTemp °F SAC Max WTemp °F CCR Max WTemp °F
Date Source Shasta
Storage
(MAF)		 Shasta
Outflow
(TCFS)		 Keswick
Outflow
(TCFS)		 KWK DAT WTemp °F SAC DAT WTemp °F CCR DAT WTemp °F BSF DAT WTemp °F JLF DAT WTemp °F BND DAT WTemp °F KWK 7DADM WTemp °F SAC 7DADM WTemp °F CCR 7DADM WTemp °F SAC Max WTemp °F CCR Max WTemp °F
2026-04-28 CDEC 4.135 3.205 3.487 54.9 55.5 56.4 57.9   58.9 55.3 56.5 58.9 56.9 59.8
2026-04-27 CDEC 4.133 4.893 5.883 54.7 55.4 56.2 57.8   58.1 55.2 56.3 58.6 56.6 59.2
2026-04-26 CDEC 4.126 4.753 5.998 55.4 55.5 55.9 57.4   58.5 55.1 56.1 58.1 56.2 57.4
2026-04-25 CDEC 4.125 6.336 5.994 55.5 55.9 56.9 58.4   59.1 55.1 56.1 58.3 57.2 59.8
2026-04-24 CDEC 4.127 6.219 5.972 55.0 55.5 56.4 57.7   58.4 55.0 56.0 58.2 56.9 59.5
2026-04-23 CDEC 4.125 5.325 5.876 54.6 55.1 55.9 56.9   57.3 54.9 55.9 58.0 56.4 59.1
2026-04-22 CDEC 4.121 3.975 6.004 54.2 54.7 55.4 56.3   56.4 55.0 55.9 57.9 55.6 57.8
2026-04-21 CDEC 4.116 4.848 5.992 54.3 54.6 55.0 55.8   55.9 55.1 55.9 57.9 55.3 57.3
2026-04-20 CDEC 4.112 5.436 5.983 54.9 54.9 55.1 56.1   57.2 55.3 56.0 58.1 55.1 55.6
2026-04-19 CDEC 4.111 5.048 6.042 55.0 55.4 56.3 57.5   58.4 55.2 56.1 58.3 56.5 58.8
2026-04-18 CDEC 4.108 5.074 6.057 54.8 55.1 55.8 56.7   57.2 55.1 55.8 57.7 56.5 59.0
2026-04-17 CDEC 4.104 5.259 6.084 54.3 54.7 55.3 56.1   56.5 55.1 55.7 57.3 55.8 58.2
2026-04-16 CDEC 4.107 5.044 5.979 54.8 55.2 55.7 56.4   56.6 55.2 55.7 57.2 56.3 58.8
2026-04-15 CDEC 4.104 5.063 5.977 55.3 55.2 55.9 56.7   57.3 55.3 55.8 57.1 56.0 57.9
2026-04-14 CDEC 4.101 7.079 6.517 54.7 54.9 55.5 56.1   56.4 55.3 55.7 57.0 56.1 58.4
2026-04-13 CDEC 4.104 6.585 7.520 53.7 54.0 54.4 54.8   54.6 55.2 55.8 57.1 55.3 56.9
2026-04-12 CDEC 4.101 8.697 8.707 53.8 54.2 54.3 54.9   55.2 55.3 56.0 57.5 54.8 54.8
2026-04-11 CDEC 4.101 9.391 10.029 55.4 55.4 55.7 56.4   56.8 55.3 56.2 58.0 55.6 56.2
2026-04-10 CDEC 4.107 9.461 9.978 55.6 55.5 56.0 56.7   57.4 55.0 56.2 58.2 56.0 57.3
2026-04-09 CDEC 4.115 9.484 9.977 55.5 55.5 56.2 57.1   57.9 54.8 56.2 58.2 56.5 58.4
2026-04-08 CDEC 4.119 9.294 9.681 54.8 55.0 55.5 57.3   58.7 54.5 56.1 58.1 55.7 56.9
2026-04-07 CDEC 4.123 3.735 4.895 54.6 55.1 56.3 58.0   59.3 54.3 55.8 57.7 56.6 59.2
2026-04-06 CDEC 4.121 4.469 4.974 54.7 55.2 56.4 57.9   58.8 54.1 55.5 57.0 56.9 59.7
2026-04-05 CDEC 4.116 4.204 4.088 54.2 54.6 55.4 57.0   58.0 54.0 55.2 56.6 56.4 58.3
2026-04-04 CDEC 4.113 4.187 4.023 53.4 54.0 54.9 56.4   56.9 53.9 55.1 56.5 55.6 57.7
2026-04-03 CDEC 4.109 3.615 4.036 53.5 54.0 54.6 55.7   56.2 54.0 55.1 56.4 55.7 57.4
2026-04-02 CDEC 4.104 3.711 4.037 53.5 54.1 54.5 55.1   55.3 53.9 55.0 56.4 55.6 57.3
2026-04-01 CDEC 4.097 3.779 4.176 53.4 53.6 53.9 55.3   55.9 53.9 55.0 56.3 54.0 54.2
2026-03-31 CDEC 4.090 4.001 4.186 53.6 53.8 54.3 55.9   57.2 53.9 55.2 56.7 54.0 54.7
2026-03-30 CDEC 4.089 4.210 4.188 53.8 54.1 54.9 56.4   57.7 53.8 55.3 57.1 55.2 56.8
2026-03-29 CDEC 4.087 3.009 4.162 53.8 54.4 55.2 56.8   57.9 53.7 55.3 57.1 55.7 57.2
2026-03-28 CDEC 4.084 3.302 4.157 53.7 54.0 54.8 56.4   57.4 53.6 55.2 57.0 55.7 57.5
2026-03-27 CDEC 4.077 3.562 4.187 52.9 53.6 54.4 56.0   56.8 53.4 55.1 57.0 54.9 56.9
2026-03-26 CDEC 4.075 3.873 4.136 53.2 53.8 54.3 56.1   57.6 53.4 55.1 57.0 55.3 56.6
2026-03-25 CDEC 4.073 3.471 4.188 53.1 53.7 54.5 56.9   58.6 53.2 55.0 57.0 55.4 57.2
2026-03-24 CDEC 4.067 3.365 4.186 52.9 53.8 54.8 57.0   58.4 53.1 54.9 56.9 55.2 57.3
2026-03-23 CDEC 4.064 3.493 4.187 52.9 53.6 54.5 56.6   58.2 52.9 54.7 56.7 54.9 56.9
2026-03-22 CDEC 4.061 3.593 4.186 52.9 53.5 54.3 56.6   58.3 52.8 54.7 56.7 54.8 56.6
2026-03-21 CDEC 4.058 3.353 4.189 52.7 53.4 54.4 57.0   58.7 52.7 54.6 56.6 54.9 57.2
2026-03-20 CDEC 4.048 3.883 4.187 52.5 53.2 54.1 56.5   58.5 52.5 54.4 56.3 55.0 57.0
2026-03-19 CDEC 4.040 2.919 4.175 52.1 53.0 54.0 56.5     52.2 54.1 56.1 54.6 56.6
2026-03-18 CDEC 4.035 3.076 4.144 52.2 53.0 53.8 56.1     52.1 54.0 55.9 54.6 56.5
2026-03-17 CDEC 4.027 2.582 4.142 52.0 52.9 53.7 55.8     52.0 53.8 55.7 54.4 56.3
2026-03-16 CDEC 4.021 3.177 4.142 52.0 52.8 53.8 55.6     51.9 53.6 55.4 54.3 56.4
2026-03-15 CDEC 4.015 3.630 4.054 52.1 52.6 53.3 54.9     51.9 53.5 55.3 54.1 56.0
2026-03-14 CDEC 4.010 2.188 3.911 51.5 52.3 53.0 55.5     51.7 53.4 55.1 53.6 55.5
2026-03-13 CDEC 4.001 3.013 4.036 51.4 52.1 52.7 54.1   54.8 51.7 53.3 54.9 53.4 55.1
2026-03-12 CDEC 3.992 3.469 3.849 51.5 52.1 52.8 54.0   54.7 51.6 53.1 54.7 53.5 55.6
2026-03-11 CDEC 3.990 3.136 4.056 51.5 52.0 52.6 53.6   54.3 51.5 52.9 54.3 53.4 55.1
2026-03-10 CDEC 3.985 3.856 4.133 51.7 52.1 52.8 54.2   55.0 51.3 52.6 54.1 53.2 54.4
2026-03-09 CDEC 3.969 3.609 4.039 51.6 52.0 52.7 54.2   55.2 51.0 52.4 53.9 53.5 55.1
2026-03-08 CDEC 3.953 3.553 4.045 51.2 51.9 52.6 54.0   54.7 50.7 52.2 53.6 53.2 55.0
2026-03-07 CDEC 3.946 3.227 4.289 50.8 51.4 52.0 53.1   53.5 50.5 52.0 53.2 52.6 54.2
2026-03-06 CDEC 3.927 2.187 4.411 50.7 51.1 51.4 52.0   52.3 50.4 51.8 53.0 52.3 53.6
2026-03-05 CDEC 3.911 2.318 4.638 50.2 50.6 50.8 51.9   52.7 50.3 51.8 52.9 51.8 53.0
2026-03-04 CDEC 3.894 3.088 4.844 50.1 50.8 51.2 53.0   53.9 50.3 51.8 52.8 51.9 53.1
2026-03-03 CDEC 3.876 3.505 5.006 49.9 50.7 51.0 52.6   53.6 50.3 51.6 52.6 51.8 53.2
2026-03-02 CDEC 3.858 3.403 5.093 49.9 50.8 51.2 53.4   54.4 50.3 51.5 52.3 51.8 53.1
2026-03-01 CDEC 3.834 3.155 5.262 50.1 50.8 51.2 53.6   54.7 50.2 51.3 52.0 51.5 52.4
2026-02-28 CDEC 3.808 4.050 5.496 50.3 51.0 51.4 53.5   54.4 50.2 51.0 51.6 51.6 52.5
2026-02-27 CDEC 3.781 4.045 5.689 50.3 51.0 51.5 53.2   53.7 50.0 50.8 51.3 52.0 53.1
2026-02-26 CDEC 3.746 3.548 5.728 50.2 50.9 51.2 52.9   53.1 49.9 50.5 51.0 51.7 52.5
2026-02-25 CDEC 3.696 3.248 5.847 50.0 50.8 51.0 52.1   51.8 49.8 50.3 50.8 51.1 51.7
2026-02-24 CDEC 3.622 3.190 5.886 49.9 50.5 50.5 51.1   50.9 49.8 50.1 50.6 50.9 50.9
2026-02-23 CDEC 3.593 4.925 5.888 49.8 49.9 50.1 50.1   50.2 49.8 50.1 50.6 50.2 50.6
2026-02-22 CDEC 3.587 4.314 5.886 49.6 49.6 49.7 49.3   49.1 49.8 50.1 50.6 49.8 50.2
2026-02-21 CDEC 3.578 4.159 5.875 49.4 49.4 49.4 48.5   48.3 49.9 50.2 50.7 49.8 50.1
2026-02-20 CDEC 3.575 4.449 5.887 49.3 49.3 49.1 47.5   47.3 50.1 50.4 50.8 50.0 50.7
2026-02-19 CDEC 3.569 3.779 5.881 49.4 49.4 49.5 47.8   47.7 50.3 50.6 51.0 50.1 51.4
2026-02-18 CDEC 3.560 4.750 5.902 49.8 49.8 49.4 48.3   48.0 50.4 50.8 51.2 50.2 50.3
2026-02-17 CDEC 3.556 5.637 6.124 49.8 49.9 49.6 49.2   49.3 50.6 51.0 51.4 50.5 50.6
2026-02-16 CDEC 3.546 5.349 6.587 50.1 50.3 50.2 50.6   50.8 50.7 51.0 51.5 50.5 50.7
2026-02-15 CDEC 3.539 5.730 7.604 50.2 50.5 50.6 51.1   51.3 50.8 51.2 51.7 50.6 50.9
2026-02-14 CDEC 3.539 7.675 8.693 50.5 50.6 50.7 50.9   51.2 50.8 51.2 51.8 50.9 51.2
2026-02-13 CDEC 3.545 7.789 10.070 50.5 50.7 50.8 51.1   51.5 50.8 51.3 51.8 51.3 52.2
2026-02-12 CDEC 3.551 9.126 10.056 50.7 50.9 51.2 51.8   51.9 50.9 51.3 51.9 51.7 52.6
2026-02-11 CDEC 3.557 9.821 10.269 50.8 50.9 51.0 51.2   51.2 50.9 51.3 51.9 51.2 51.6
2026-02-10 CDEC 3.565 10.883 11.481 50.7 50.7 50.7 50.7   50.7 50.9 51.3 52.0 51.0 51.4
2026-02-09 CDEC 3.575 10.484 11.479 50.6 50.7 50.8 51.0   51.1 50.9 51.4 52.2 51.4 52.1
2026-02-08 CDEC 3.587 10.196 11.304 50.7 50.8 50.9 51.1   51.2 51.0 51.5 52.3 51.0 51.4
2026-02-07 CDEC 3.598 11.794 11.359 50.7 50.7 50.7 50.8   50.8 51.0 51.6 52.4 51.2 51.6
2026-02-06 CDEC 3.609 10.255 9.993 50.7 50.8 50.9 50.9   50.9 51.1 51.6 52.4 51.4 52.4
2026-02-05 CDEC 3.614 9.638 9.815 50.7 50.8 50.9 51.0   51.0 51.1 51.6 52.4 51.6 52.7
2026-02-04 CDEC 3.621 9.330 9.830 50.8 50.9 51.1 51.1   51.1 51.2 51.6 52.3 51.7 52.6
2026-02-03 CDEC 3.627 9.828 9.754 50.9 50.9 51.0 51.1   51.0 51.2 51.6 52.2 51.8 52.5
2026-02-02 CDEC 3.634 7.957 8.481 50.8 50.9 51.0 51.0   50.9 51.2 51.5 52.1 51.8 52.6
2026-02-01 CDEC 3.640 7.094 8.490 50.8 50.9 51.0 51.0   50.9 51.2 51.5 52.1 51.6 52.4
2026-01-31 CDEC 3.645 7.553 8.492 50.9 50.9 50.9 50.7   50.6 51.3 51.5 52.0 51.4 51.9
2026-01-30 CDEC 3.649 7.923 8.719 51.0 51.0 51.1 50.9   50.9 51.3 51.5 52.0 51.6 52.3
2026-01-29 CDEC 3.655 8.473 9.836 50.9 50.9 50.9 50.8   50.5 51.3 51.6 52.0 51.3 51.7
2026-01-28 CDEC 3.655 5.468 6.580 50.9 51.0 51.2 51.2   50.5 51.3 51.6 52.1 51.5 52.3
2026-01-27 CDEC 3.652 5.148 6.706 50.9 50.9 50.8 50.3   49.9 51.4 51.6 52.0 51.3 51.6
2026-01-26 CDEC 3.651 6.154 7.688 51.2 51.1 51.0 50.4     51.5 51.7 52.1 51.7 52.2
2026-01-25 CDEC 3.653 9.388 8.747 51.2 51.1 50.8 50.2     51.5 51.8 52.1 51.6 51.8
2026-01-24 CDEC 3.658 8.210 10.251 51.1 51.2 51.0 50.8     51.6 51.8 52.2 51.7 52.0
2026-01-23 CDEC 3.662 10.120 11.784 51.3 51.4 51.4 51.3     51.8 51.9 52.3 51.8 52.3
2026-01-22 CDEC 3.671 10.975 13.435 51.4 51.5 51.5 51.6     51.9 52.0 52.4 51.8 52.3
2026-01-21 CDEC 3.675 12.434 14.967 51.5 51.5 51.5 51.4     52.1 52.2 52.5 51.6 51.8
2026-01-20 CDEC 3.681 12.438 14.917 51.6 51.6 51.6 51.5   51.2 52.2 52.3 52.7 51.8 52.2
2026-01-19 CDEC 3.692 12.463 14.890 51.6 51.7 51.7 51.5   51.2 52.3 52.4 52.8 52.0 52.4
2026-01-18 CDEC 3.700 11.520 14.873 51.8 51.8 51.9 51.6   51.2 52.3 52.4 52.9 52.2 52.6
2026-01-17 CDEC 3.709 12.677 14.882 51.9 52.0 52.0 51.8   51.5 52.4 52.4 52.9 52.2 52.6
2026-01-16 CDEC 3.719 14.433 14.876 52.3 52.3 52.4 52.1   51.7 52.4 52.5 53.0 52.7 53.2
2026-01-15 CDEC 3.731 15.271 14.777 52.3 52.2 52.3 51.9   51.5 52.4 52.4 52.9 52.6 53.0
2026-01-14 CDEC 3.738 13.553 14.812 52.3 52.2 52.3 51.7   51.1 52.3 52.3 52.8 52.5 53.0
2026-01-13 CDEC 3.744 14.012 14.975 52.2 52.1 52.1 51.4   50.8 52.3 52.3 52.7 52.4 52.9
2026-01-12 CDEC 3.747 12.916 14.978 52.1 52.0 52.1 51.4   50.7 52.3 52.3 52.7 52.3 52.7
2026-01-11 CDEC 3.747 12.253 14.891 52.2 52.1 52.2 51.4   50.7 52.2 52.3 52.6 52.4 52.9
2026-01-10 CDEC 3.743 12.956 15.092 52.4 52.2 52.3 51.3   50.4 52.2 52.3 52.6 52.5 53.0
2026-01-09 CDEC 3.736 11.889 15.061 52.1 51.8 51.8 50.7   49.8 52.2 52.3 52.6 52.4 52.8
2026-01-08 CDEC 3.721 12.590 15.081 51.6 51.6 51.6 51.1   50.8 52.2 52.2 52.5 51.8 52.1
2026-01-07 CDEC 3.697 12.127 14.837 52.1 52.1 52.2 52.2   51.9 52.2 52.3 52.6 52.3 52.6
2026-01-06 CDEC 3.646 5.504 9.897 52.0 52.1 52.2 51.9   51.3       52.4 52.8
2026-01-05 CDEC 3.554 6.357 9.920 52.0 51.9 52.0 51.5   51.3       52.0 52.1
2026-01-04 CDEC 3.463 8.286 10.005 52.2 52.3 52.4 52.4   52.1       52.4 52.6
2026-01-03 CDEC 3.379 7.792 9.889 52.2 52.3 52.5 52.6   52.3       52.5 52.9
2026-01-02 CDEC 3.330 5.209 7.390 52.2 52.1 52.4 51.9   51.6       52.3 52.7
2026-01-01 CDEC 3.304 5.509 7.314 52.2 52.2 52.2 51.4   51.1       52.2 52.3

Query Notes

Data Methods

  1. Data Courtesy of CDEC
  2. Hourly data is retrieved from CDEC on a daily basis.
  3. Columbia Basin Research (CBR) QA/QC processes hourly data for outliers, false data (e.g., 32F measured by satellite), and data outside expected range of observation (e.g., 90F). Data loaded into CBR database.
  4. CBR calculates Daily Average values based on CBR cleaned hourly values.
  5. CBR calculates 7 Day Average of Daily Maximum (7DADM) values based on CBR cleaned hourly values.
  6. Query for daily average water temperature for selected year and query maximum hourly value per day for selected year.
  7. Examine daily average data for criterion during date periods.

Threshold Analysis Criteria

Please refer to the Sacramento River Temperature Task Group (SRTTG) annual reports for details on within water year activities.