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Weather & Water Flow of Colorado River in Grand Canyon

This morning we were asked the following question about information on Colorado River rafting in the Grand Canyon.

"We are really interested in the Grand Canyon trip.  If none are available for this year and we want to reserve for next season, what is the optimum time for a trip?  When is the best for temperature, river conditions, bugs, etc.?"

We were happy to respond with the following information.

The river flow and water temperature of the Colorado River in Grand Canyon are the same throughout the season as they are regulated at Glen Canyon Dam.  The water is cold at 52 degrees as it comes out of the bottom of the dam.  Air temperature follows the chart below.

Temperature and Precipitation in Grand Canyon

 
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
 
Mean Max. Temp
71°
82°
92°
101°
106°
103°
96°
84°
Mean Min. Temp.
48°
56°
63°
71°
79°
75°
70°
58°
Precipitation
.79"
.47"
.36"
.30"
.84"
1.4"
.97"
.65"



The latter part of May is nice for hiking and sleeping.  There are no ‘bugs’ to worry about.  June is the most popular month because more families travel in June.  We are taking reservations now for 2012 and will be happy to help you with your Colorado River Vacation plans as soon as you are ready.

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