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)
| 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