Fall is here — for meteorologists (and anyone eager for sweater weather and all things cinnamon) — and with a chill.

While the first day of autumn on astronomical calendars is Sept. 22, meteorologists begin their record-keeping for the season on Sept. 1, meaning Wednesday marked the start of what is known as meteorological fall.

The National Weather Service in Seattle used the start of the season to remind people on Twitter to prepare for fall weather hazards, offering safety tips at weather.gov/wrn/fall-safety.

Temperatures across Western Washington were in the 40s Wednesday morning, with some areas seeing fog or low hanging clouds, according to the National Weather Service.

Though the morning started off gray, sunshine was expected to creep in later in the afternoon, bringing with it temperatures in the upper 60s and mid-70s, said Steve Reedy, a meteorologist with the weather service.

Temperatures in the 60s and 70s are expected for the rest of the week and into the beginning of next week.

“We’re not quite out of the summer yet,” Reedy said.