Hot Temperatures This Week to Usher in Official Start of Summer

With summer right around the corner, temperatures will heat up across Southern California this week, with highs hovering in the 90s in many areas.

Pasadena is looking at predicted highs of 93 Monday, 89 Tuesday, 90 Wednesday and 91 Thursday.

Tuesday is the first day of summer.

Brief critical fire weather conditions were expected Sunday night in the valleys due to low humidity and wind gusts peaking in the 35 mph to 50 mph range. Low humidity from 8% to 18% will persist throughout the week. However, forecasters noted the possibility of tropical moisture reaching Los Angeles County by Wednesday, which could result in cumulus buildups in the mountains and a temporary increase in daytime humidity.

As usual during heat waves, forecasters urged people to drink plenty of fluids, seek out air-conditioned spaces and check in on vulnerable relatives and neighbors.

“Extreme heat will significantly increase the potential for heat-related illnesses, particularly for those working or participating in outdoor activities,” according to the NWS.

“Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during warm or hot weather when car interiors can reach lethal temperatures in a matter of minutes.”

Here is the National Weather Service forecast for Pasadena this week:

Today: Sunny, with a high near 95. North northeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

Tonight: Clear, with a low around 61. West southwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 15 mph.

Tuesday: Sunny, with a high near 90. East northeast wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.

Tuesday Night: A 20 percent chance of showers and thunderstorms after 11 p.m. Partly cloudy, with a low around 64. South wind 5 to 10 mph becoming east southeast after midnight.

Wednesday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 92. West southwest wind 5 to 15 mph becoming south in the morning.

Wednesday Night: Mostly clear, with a low around 65.

Thursday: Sunny, with a high near 91.

Thursday Night: Mostly clear, with a low around 65.

Friday: Sunny, with a high near 92.

Friday Night: Mostly clear, with a low around 64.

Saturday: Sunny, with a high near 92.

Saturday Night: Clear, with a low around 66.

Sunday: Sunny, with a high near 94.