SAN FRANCISCO (KRON) – It’s going to remain hot for the rest of this week, with temperatures forecasted to hit the 90s and even triple digits across the Bay Area. KRON4 looked into the hottest days we’ve seen on record in our area. 

Using data from the National Weather Service, we determined that the previous hottest day in San Francisco’s history occurred on September 1, 2017 when the city hit a blistering 106 degrees. We know that areas outside of the city can be even hotter on days like this, and that was true in 2017 too. San Jose hit a high of 108 on Sept. 1, 2017.

There was certainly a heat wave that week, because on Sept. 3, 2017 the Napa area hit 108 degrees, nearly 20 degrees hotter than their historical average. But who had it the hottest? Our friends in Gilroy saw their thermostats hit 112 degrees on Sept. 2, 2017. 

On Tuesday, Sept. 6 many parts of the Bay Area hit record highs, and one city even smashed a record that was over 100 years old. Here’s a breakdown of the records that shifted in this week’s heat wave.

Hottest days on record across the Bay Area

Gilroy – 115° on July 15, 1972

San Francisco – 106° on Sept. 1, 2017

Big Sur – 106° on Sept. 2, 2017

Hollister – 112° on July 22, 2006

Kentfield – 112° in Jul 7, 1913

King City – 115° on Sept. 2, 2017

Livermore – 116° on Sept. 5 & 6, 2022 (previous record 113° on July 23, 2006)

Monterey – 104° on Oct. 08, 1996

Napa – 114° Sept. 6, 2022 (previous record 113° degrees in June 14, 1961)

Redwood City – 110° Sept. 6, 2022 (tied previous record 110° in 1972)

Salinas – 107° on Sept. 2, 2017

San Jose – 109° on Sept. 6, 2022 (previous record 108° on Sept. 1, 2017)

Santa Cruz – 110° on Sept. 3, 2017

Sonoma/Santa Rosa – 115° Sept. 6, 2022 (previous record 111° on Sept. 6 & 7, 2020)

San Rafael – 110° on Sept. 1, 2017

The CDC recommends that you take precautions any time you are exposed to extreme temperatures. Staying hydrated and using sunscreen are both recommended when spending time in high temperatures like these.