Southern California Temperatures to Climb Near 90° This Weekend

Temperatures in Pasadena and surrounding inland valleys will climb from the mid-80s to near 90 degrees by Sunday as a high pressure ridge builds over Southern California, the National Weather Service said Tuesday.

The warming trend begins Wednesday and peaks over the weekend, forecasters said. Coastal areas will remain much cooler, with highs in the 60s and 70s.

“An upper level ridge of high pressure is currently building over the area,” weather service forecasters said in their Tuesday morning forecast discussion.

Tuesday’s high will reach 86 degrees in Pasadena, with patchy morning fog clearing by 11 a.m. and gradual clearing through the afternoon.

The pattern will continue Wednesday with a slight dip to 85 degrees, followed by brief cooling Thursday and Friday to 84 and 83 degrees respectively.

The most significant warming arrives Saturday, when temperatures rise to 86 degrees under partly sunny skies. Sunday will be the warmest day with full sunshine and a high of 89 degrees.

Morning fog patches will persist through Friday before 11 a.m., then clear as the marine layer retreats. The marine layer influence will diminish significantly over the weekend.

Winds will remain light and variable throughout the week, typically shifting to south-southwest at 5 to 10 mph in the afternoons.

No precipitation is expected during the forecast period. The strengthening high pressure system will maintain dry conditions across the San Gabriel Valley.

The warming trend continues into early next week, with Monday maintaining sunny skies and temperatures around 88 degrees.

No weather advisories are in effect for the Pasadena area, though gusty sundowner winds will affect southwestern Santa Barbara County with wind advisories issued for those regions.

Here is the latest forecast for Pasadena from the National Weather Service as of 3:11 a.m. on Tuesday, June 10.

Today: Patchy fog before 11:00 a.m. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.

Tonight: Patchy fog after 1:00 p.m. Otherwise, increasing clouds, with a low around 61. South southwest wind around 5 mph becoming calm in the evening.

Wednesday: Patchy fog before 11:00 a.m. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 85. Light and variable wind becoming south southwest 5 to 10 mph in the afternoon.

Wednesday Night: Patchy fog after 11:00 p.m. Otherwise, increasing clouds, with a low around 61. South southwest wind 5 to 10 mph becoming light and variable in the evening.

Thursday: Patchy fog before 11:00 a.m. Otherwise, partly sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.

Thursday Night: Patchy fog after 11:00 p.m. Otherwise, mostly cloudy, with a low around 62.

Friday: Patchy fog before 11:00 a.m. Otherwise, partly sunny, with a high near 83.

Friday Night: Patchy fog after 11:00 p.m. Otherwise, mostly cloudy, with a low around 62.

Saturday: Patchy fog before 11:00 a.m. Otherwise, partly sunny, with a high near 86.

Saturday Night: Partly cloudy, with a low around 62.

Sunday: Sunny, with a high near 89.

Sunday Night: Mostly clear, with a low around 63.

Monday: Sunny, with a high near 88.