The National Weather Service says today's high temperature will be at least 20 degrees cooler than the record busting 108 degrees on Saturday in Sacramento. And it advises that thunderstorms may arrive after 11 a.m.
Typically, the high temperatures for this date are 86 degrees. The NWS is predicting a high of 87 in Sacramento.
It forecasts 20 percent chance of showers and thunderstorms.
The major drop-off in heat from Saturday is attributed to strong Delta breezes. It has been relatively windy this morning, with winds measured at 11 to 17 mph. The NWS calls for gusts up to 23 mph. Those breezes will result in significantly cooler afternoon temperatures today.
The weather service attributed the break in the weather to the high pressure cell moving eastward into the Great Basin.
"The biggest forecast challenge for today and Monday is the potential for thunderstorms," the NWS reported.
It calls for isolated to scattered storm along the Northern Sierra this afternoon and off and on through Monday.
"The question will be where any storms will be able to drift into the foothills or lower elevations," it said.
By Monday night, the weather will return to a typical June, with seasonal temperatures in the mid 80s to 90, it said.
Here is the NWS seven-day forecast:
Today -- A 20 percent chance of showers and thunderstorms after 11a.m. Mostly sunny, with a high near 87. Southwest wind 11 to 17 mph, with gusts as high as 23 mph. Tonight - A 20 percent chance of showers and thunderstorms.
Monday A 20 percent chance of showers and thunderstorms before 11 a.m. Partly sunny, with a high near 78. Southwest wind 11 to 14 mph, with gusts as high as 18 mph.
Tuesday -- Mostly sunny, with a high near 86.
Wednesday --Sunny, with a high near 87.
Thursday Sunny, with a high near 88.
Friday Sunny, with a high near 91.
Saturday Sunny, with a high near 90.