February 20, 2026 4:06 PM

A Brief Heatwave in the 5 Day Forecast

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week’s weather forecast for Monday August 4 through Friday August 8 for Southern California. Check out the 5-day forecast below in your area.

Cajon Pass/Inland Empire Valley Area Average Weather/Temps:

Monday will be hot, sunny, and a high of 95°. Tuesday will be hot, sunny, with a high of 97°. Wednesday will be hot, sunny, and a high of 99°. Thursday will be hot, mostly sunny, and a high of 101°. Friday will be hot, mostly sunny, and a high of 99°.

High Deserts Area Average Weather/Temps:

Monday will be hot, sunny, windy, and a high of 96+°. Tuesday will be hot, sunny, windy, and a high of 99+°. Wednesday will be hot, sunny, windy and a high of 102+°. Thursday will be hot, mostly sunny, windy, and a high of 105+°. Friday will be hot, mostly sunny, windy, and a high 105+°. Higher temps in the Barstow area.

Mountains Area Average Weather/Temps:

Monday will be warm, sunny, windy, and a high of 82°. Tuesday will be warm, sunny, windy, and a high of 83°. Wednesday will be warm, sunny, windy and a high of 84°. Thursday will be warm, mostly sunny, windy, and a high of 86°. Friday will be warm, mostly sunny, windy, and a high of 84°.

*Timing/Weather on each day can change.

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Cajon Pass
4:06 pm, Feb 20, 2026
temperature icon 45°F
broken clouds
Humidity: 38 %
Pressure: 1015 mb
Wind: 2 mph
Wind Gust: 3 mph
Clouds: 71%
Visibility: 10 km
Sunrise: 6:29 am
Sunset: 5:37 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
7:00 pm
temperature icon
36°/42°°F 0 mm 0% 6 mph 48% 1017 mb 0 mm/h
10:00 pm
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35°/39°°F 0 mm 0% 3 mph 54% 1019 mb 0 mm/h
1:00 am
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33°/33°°F 0 mm 0% 3 mph 64% 1022 mb 0 mm/h
4:00 am
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34°/34°°F 0 mm 0% 5 mph 64% 1023 mb 0 mm/h
7:00 am
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33°/33°°F 0 mm 0% 5 mph 63% 1024 mb 0 mm/h
10:00 am
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43°/43°°F 0 mm 0% 6 mph 43% 1024 mb 0 mm/h
1:00 pm
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50°/50°°F 0 mm 0% 2 mph 36% 1022 mb 0 mm/h
4:00 pm
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53°/53°°F 0 mm 0% 7 mph 38% 1021 mb 0 mm/h