What's wrong with the weather? Well nothing, as far as homeowners and businesses that pay utility bills (heating and cooling) are concerned. But, otherwise…
We seem to be heading for a second summer in a row with below-average temps. In 2010, for instance, our highest temperature was 102 degrees, in August, and our average high (all high temps averaged together) was only 100 degrees, instead of our usual 107.2 degrees (that's a 30-year average from 1981 to 2010). Are we heading for another below-average summer? I believe so, but why?
The weather's been weird since March. The local area was at least spared the horrendous tornado outbreaks in March and April, the worst since 1932. But we've been cooler and more windy than normal. Example: The high temp average in winter (January – March) is 77 degrees; we only managed 74.6 degrees. Example: The average temperature for the same time period is 49.4 degrees; we only managed 47.7. And rainfall was 4.17 inches; the average is 4.11. So what is normal? But why are the temperatures lower?
I heard two independent reports that during the March eleventh earthquake in Japan (the worst on record), the Earth's axis shifted four degrees. Since the inclination of Earth's axis causes our seasons, such an event could be catastrophic. The northern pole is tilted toward the Sun in the summer and the southern pole is tiled toward the Sun in their summer (and our winter). An increase or decrease would cause our summer and winter temps to be more or less severe. I am of the opinion that the Earth momentarily "wobble" because of that earthquake. I detect no difference in the path of the Sun in the sky. The "wobble" (if there was one) definitely could have affected storm tracks, causing the tornadoes in the East and Midwest and our cooler-than-average temps locally, and cold fronts (from Canada) late in the season.
But there's a more obvious answer. In 2010, particularly in December, we had a record 17.9 inches of rain, instead of only 7.49 (Hesperia's average). That's over 10 inches higher than usual. That moisture is still in the soil, and will be there for some time, and its presence means increased evaporation. And increase evaporation has cooled the air mass, and raised the humidity. And that added to the 4.17 inches in winter 2010/11 (January – March 2011). We're now in June and I'm still seeing humidity and dewfall almost every day! Dewfall is usually a rarity in the month of June. And the increase of humidity and dewfall is most probably tied into the moisture still present in the soil
This is probably the answer. But take heart! Your AC bill this summer might be the lowest on record, too. Enjoy it while it lasts.