The Valley's first real stretch of summerlike weather is expected to give way to a short cooling trend this week, according to the National Weather Service in Hanford.
Fresno's high temperature was 96 Sunday, the fourth consecutive day of 90-plus degree temperatures.
While highs today should remain in the 90s, a changing weather pattern will drop temperatures into the low 80s by Thursday, the weather service said. Low temperatures are expected to be in the 50s by Wednesday.
"It looks like we're going to cool down quite significantly," said weather service meteorologist David Spector.
He said the dip in temperatures is characteristic of June in the Valley.
The cold, dry air is a result of a Pacific Northwest trough that is also likely to cause windy conditions at higher elevations, he said.
The lower temperatures shouldn't last long, though. The Valley is expected to return to the 90s by the end of next weekend, Spector said.