Highs on Wednesday are expected to cool by a few degrees as the clouds will thicken up with the sub-tropical moisture streaming in. Even so...we're talking about a warm and humid day. Coastal temperatures will warm back into the 70s and 80s on Wednesday, with the valleys warming into the upper 80s and 90s. Of course the bigger story will be the chance for showers and storms because of the warm and humid airmass.
Sub-tropical moisture will decrease late this week, so rain chances by then should return to the mountains and deserts of Southern California. As we lose the humidity, we'll see our temperatures moderate with some real heat returning to the forecast by Thursday and Friday. A trough of low pressure moving into northern California this weekend will help to dry out the atmosphere and allow for some more pleasant temperatures. In fact, daytime highs will return to near normal for this time of the year through the weekend, and should stay there through early next week.