Generally, summer is low season and is cheaper than winter. Winter is high season, so consequently is more expensive than summer.
Seasons in Egypt are as follows, subject to variations:
Season (A)
From may 1st through first half or end of July according to the product offered.
Season (B)
From second half or end of July till end of September
Season (C)
From October till end of January (except Xmas & New Year period)
Season (D)
From February till end of April (except Easter period)