It is common to find that when some way into a long period of nice wx, not many people are flying.
The usual pattern in UK GA is there is manic activity on the first weekend after a long period of bad wx, and this sets the pattern, in the usual UK situation of frontal muck passing through. But if you get too much good wx, people probably spend their budgets after the first one or few weekends.
The latter part of the great summer of 2003 was very quiet at otherwise busy GA airfields.