Water Levels

USGS Arizona Site -

Table generated from above site of average monthly flows (cfs). Broadly speaking, it's amazingly stable.
Table generated from above site of monthly average water temperature (degrees C)

Air Temperatures (taken from the Grand Canyon National Park Weather Page)

Grand Canyon Inner Gorge Weather Stats

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Average High - °F 55.5 62.9 71.0 82.6 91.3 101.4 106.3 102.6 97.6 85.8 67.7 56.9 81.8
Average Low - °F 36.0 40.2 46.1 54.8 62.4 71.0 76.8 74.0 68.1 58.4 44.8 36.3 55.8
Avg Precip (in) 0.67 0.74 0.80 0.48 0.37 0.37 0.83 1.59 0.81 0.68 0.39 0.71 8.44
Avg Snowfall (in) 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2

 

Lake Mead Site - from this site, there is a graph of historical lake levels, Lake Mead levels and Hoover Dam releases

Back to Grand Canyon Index