Drivers and residents will face some of the highest temperatures of the summer this week in San Diego County’s desert areas, with temperatures rising as high as 119 degrees near Borrego Springs, the National Weather Service says.
The eastern half of the county also will become unusually humid as remnants of a weak tropical depression southwest of Baja California flow into the region.
The moist, unstable air is not expected to produce thunderstorms. But SDG&E says there will be an elevated risk of wildfires in East and North County most of the week.
The daytime high temperature southeast of Borrego Springs, not far from Ocotillo Wells, will be 115 on Tuesday, 119 on Wednesday, 118 on Thursday and 116 on Friday.
Temperatures in Campo will peak at 98 on Wednesday and Thursday, while Julian reaches 91.
On Wednesday and Thursday, the temperature could rise to between 102 and 104 in the elevated area of Interstate 8 near the border of San Diego and Imperial counties.
Drivers should make sure that there is enough coolant in their car’s radiator before they hit the road in such temperatures, and should temporarily limit their use of air conditioning when driving up steep hills or mountains.
But coastal areas will be much cooler. San Diego will top out at 77 on Tuesday, 79 on Wednesday, 80 on Thursday and 76 on Friday. The seasonal high is 75.
Originally Published: July 7, 2025 at 1:53 PM PDT