We've been having typical June weather. Remember the floods last year? It's our typical British summer, ie crap.
We had a couple of good, hot summers a few years ago, and everyone yelled 'global warming' and promised threatened we'd have hotter summers ever after! Yeah right! But that was the aberration...not the weather we're having now (sadly).
Still...you are not being unreasonable at all.
July is supposed to get better (allegedly). Keep em crossed!