More than a week into October, the Bay Area finally embraced temperatures Tuesday that weren’t quite so frightening.

Still, full relief from the extreme heat that’s marked one of the hottest starts to the month in recorded history still appeared to be another day away, according to the National Weather Service.

“Temperatures very slowly are going to start inching back toward normal,” NWS meteorologist Rick Canepa said Tuesday. “At the moment, there are factors in play that are continuing to help the (high-pressure) ridge, but the (low-pressure) trough is starting to deepen.”

The trough developing in the Gulf of Alaska wielded enough influence by noon Tuesday that temperatures that had soared above 100 degrees in the hottest areas for most of the past week showed no inclination to get there again.

At noon Tuesday, the hottest spots in the region — Livermore (90 degrees) and Pleasanton (85) in Alameda County; Brentwood (90) and Concord (88) in Contra Costa County — had either barely eclipsed 90 degrees or were approaching it, according to the weather service. Those places all were expected to run between 94 and 98 degrees for their high temperatures, weather service forecaster Alexis Clouser said.

A heat advisory for the interior regions and hills in the East Bay and the Eastern Santa Clara Hills remained in place through 7 p.m. Tuesday, according to the weather service.

Despite that, the record-setting days appeared to be over.

“Unless something jumps up real quick unexpectedly, (new records Tuesday don’t) appear likely at all,” Canepa said.

In the South Bay and near the coast, the temperatures more dramatically reflected a cooler day. The thermometer at mid-day read 90 degrees in Morgan Hill, 84 in San Jose and 78 in Redwood City, according to the weather service. The hottest of those temperatures was expected to be 93 in Morgan Hill. San Jose was expected to reach 90.

Along the coast and the Bay, temperatures were not expected to get much past 81 degrees. San Mateo was there at mid-day and not expected to get higher. In downtown Oakland it was 73 degrees at noon. In downtown San Francisco, which boiled at a record 97 degrees on Sunday, it was 70.

“Temperatures aloft are still above normal for this time of year,” Canepa said. “But they are not quite as warm as they’ve been the past several days. Overall, the structure of this system that created this is weaker, and we’ll see the effects of that over the next several days.”

The final day of excessively hot conditions broke more records. San Rafael reached 108 degrees on Monday, 9 degrees warmer than the mark set in 1996. Santa Rosa (102), Napa (101) and Redwood City (99) also broke 28-year-old heat records for the day. Oakland reached 95, surpassing the record mark of 92 it set last year. And San Jose reached 102, 8 degrees warmer than its record mark set a year ago.

That should be the last busy day for the record keepers, at least for the time being, Canepa said.

“That trough is going to keep its working its way toward us,” Canepa said. “We’re going to have cooler air, more sea breezes and a lot more comfort.”