What's up with this weather?

Houston in April is typically hot and humid. Not as hot as May and certainly not as hot as July but almost always hot and usually the time where we turn on the old air conditioner for the first time. The light bills start their steady climb towards, oh say $400 a month and ceiling fans won't be turned off until at least October. This has to be the first April in at least 20 years that we have gone without a single day of no A/C. Totally, toally bizarre! Global warming????
Maybe. All I know is that this is weird weather for Houston!