September 30, 2026 10:53 PM

Summer Time is Over but a Heat Wave is Starting Friday and will Last Over a Week Long

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> Southern California is bracing for an extended heat wave that will push temperatures 15 to 20 degrees above normal for at least 10 days.

Heat peak will be Saturday October 3 and on Wednesday October 7.

Bad news, typical Santa Ana winds could start on Friday afternoon into the weekend and the Big-O high-pressure system will begin shifting back toward Arizona before the weekend, bringing afternoon highs over 100° to 105+° to parts of the Inland Empire Valleys. For the high and low deserts and mountain cities will be normal hot temps.

This will cause the overnight temps to be in the high 70’s or higher. This will be no relief at night.

You can guarantee this they will issue an Extreme Heat Warnings and Advisories for parts of SoCal.

Hot afternoons in October are not uncommon in Southern California but it’s a little hotter in normal temps.

To put over 5 days in a row with temperatures above the average, that’s why it’s a heat wave.

Heat Health Safety Tips:

Stay hydrated! The more hydrated you are, the more effective your body will be keeping your cool. Drink water – not sodas, energy drinks, and alcoholic drinks, which will could dehydrate you.

Avoid exercise in the middle of the day. If you need to exercise outside, do it early in the morning when the temperature is lower.

Wear lightweight, light-colored natural fabrics like cotton and linen, as these will help your skin breathe and let your sweat evaporate, this will keep you cooler.

Turn off big appliances and help prevent black-outs!

Make sure your pets have shade and lots of water.

Do Not leave pets or children in unattended vehicle. Look Before You Lock

This heatwave can expect higher above normal temps start on Friday through next week and end around Sunday October 11.

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Cajon Pass
10:53 pm, Sep 30, 2026
temperature icon 67°F
clear sky
Humidity: 39 %
Pressure: 1010 mb
Wind: 10 mph
Wind Gust: 10 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 6:43 am
Sunset: 6:35 pm
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86°/86°°F 0 mm 0% 7 mph 11% 1011 mb 0 mm/h
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70°/70°°F 0 mm 0% 3 mph 18% 1011 mb 0 mm/h