Trends in Stream Temperature in the Snake River
 
 
 
 
Tribal Connection: Trends in Stream Temperature in the Snake River

This feature tracks the summer water temperature of the Snake River.

Climate change has challenged and will continue to challenge some of the traditional ways of life that have sustained indigenous peoples for thousands of years. In the Pacific Northwest, warming river and stream temperatures will threaten ecosystems and species, including salmon populations. Salmon play a particularly important role in the diet, culture, religion, and economy of Native Americans in this region.
Pacific Northwest Salmon

Salmon are sensitive to water temperature at many stages of their lives. They spend much of their adult lives in the ocean, then migrate inland to spawn. Salmon need cold water to migrate and for their young to hatch and grow successfully. Warmer water can negatively affect fish, making it more difficult for them to swim upstream. It can also make fish more susceptible to disease. River and stream temperatures in the Pacific Northwest are influenced by many factors, but are expected to rise as average air temperatures increase (see the U.S. and Global Temperature indicator).

The graph shows average August water temperatures at a site in the Snake River, in eastern Washington near Nez Perce tribal lands. Several species of salmon use the Snake River to migrate and spawn. Between 1960 and 2015, water temperature has increased by 1.4°F.

Technical Documentation

Download related technical information PDF
Figure 1. Average August Temperature in the Snake River, 1960–2015
This graph shows average August water temperatures at a site along the Snake River in eastern Washington.
Data source: USGS, 20167
 
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