September 8, 2026 8:35 AM

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
8:35 am, Sep 8, 2026
temperature icon 74°F
broken clouds
Humidity: 64 %
Pressure: 1015 mb
Wind: 0 mph
Wind Gust: 1 mph
Clouds: 80%
Visibility: 10 km
Sunrise: 6:27 am
Sunset: 7:06 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
11:00 am
temperature icon
74°/74°°F 0 mm 0% 3 mph 57% 1015 mb 0 mm/h
2:00 pm
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79°/82°°F 0 mm 0% 4 mph 43% 1015 mb 0 mm/h
5:00 pm
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84°/84°°F 0 mm 0% 2 mph 29% 1013 mb 0 mm/h
8:00 pm
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76°/76°°F 0 mm 0% 2 mph 39% 1014 mb 0 mm/h
11:00 pm
temperature icon
74°/74°°F 0 mm 0% 2 mph 42% 1016 mb 0 mm/h
2:00 am
temperature icon
72°/72°°F 0 mm 0% 3 mph 44% 1016 mb 0 mm/h
5:00 am
temperature icon
70°/70°°F 0 mm 0% 4 mph 44% 1016 mb 0 mm/h
8:00 am
temperature icon
74°/74°°F 0 mm 0% 3 mph 39% 1018 mb 0 mm/h