San Luis Obispo hit a record-high temperature Wednesday of 91.4 degrees, breaking the previous record for the date of 90 degrees set in 1953, local forecaster John Lindsey said.
And conditions could remain hot today, as cooling ocean breezes won’t return until Friday, Lindsey said.
The record-breaking temperature was recorded by San Luis Obispo’s official thermometer, which is at Cal Poly.
The high in Paso Robles on Wednesday reached 90 degrees, according to the National Weather Service, well short of that city’s record high for the date of 101 degrees.
The cause of the heat wave was high pressure that created offshore winds, which also dried out the humidity in the air.
Lindsey said the temperature reached 88 degrees in Baywood Park at noon, and the relative humidity in the air was 20 percent. Then, the offshore winds died down, and the breeze began to blow from the Pacific Ocean. In one hour, the temperature dropped 20 degrees and the humidity rose to 60 percent.
Other temperatures readings around San Luis Obispo on Wednesday:
- SLOWeather.com, on the city’s west side: 93 degrees.
- Islay Hill: 94 degrees.
- San Luis Obispo’s water reclamation plant: 91 degrees.
The record high for the month of May in San Luis Obispo is 102 degrees, set on May 22, 2000.