September 12, 2026 1:38 PM

Hot August Days and Nights in this Weeks 5 Day Forecast

OUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week weather forecast for Monday August 24 through Friday August 28 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, mostly sunny, and a high 103°. Tuesday will be hot, mostly sunny, with a high of 104°. Wednesday will be hot, mostly sunny, and a high of 104°. Thursday will be hot, mostly sunny, and a high of 106°. Friday will be hot, mostly sunny, and a high of 107°.  

High Deserts Area Average Weather/Temps:

Monday will be hot, sunny, windy, and a high of 104+°. Tuesday will be hot, sunny, windy, and a high of 105+°. Wednesday will be hot, mostly sunny, windy and a high of 107+°. Thursday will be hot, mostly sunny, windy, and a high of 107+°. Friday will be hot, mostly sunny, windy, and a high 108+°. Higher temps in the Barstow area.    

Weather

Mountains Area Average Weather/Temps:

Monday will be hot, sunny, windy, and a high of 84°. Tuesday will be hot, sunny, windy, and a high of 86°. Wednesday will be hot, sunny, windy, and a high of 88°. Thursday will be hot, mostly sunny, windy and a high of 88°. Friday will be hot, mostly sunny, windy, and a high of 89°.

*Timing of the Weather on each day can change.

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Cajon Pass
1:38 pm, Sep 12, 2026
temperature icon 88°F
clear sky
Humidity: 23 %
Pressure: 1011 mb
Wind: 11 mph
Wind Gust: 11 mph
Clouds: 6%
Visibility: 10 km
Sunrise: 6:30 am
Sunset: 7:01 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
2:00 pm
temperature icon
81°/88°°F 0 mm 0% 12 mph 23% 1011 mb 0 mm/h
5:00 pm
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80°/86°°F 0 mm 0% 14 mph 26% 1011 mb 0 mm/h
8:00 pm
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70°/76°°F 0 mm 0% 11 mph 40% 1012 mb 0 mm/h
11:00 pm
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65°/65°°F 0 mm 0% 6 mph 56% 1013 mb 0 mm/h
2:00 am
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63°/63°°F 0 mm 0% 5 mph 57% 1013 mb 0 mm/h
5:00 am
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60°/60°°F 0 mm 0% 3 mph 56% 1012 mb 0 mm/h
8:00 am
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66°/66°°F 0 mm 0% 3 mph 48% 1013 mb 0 mm/h
11:00 am
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77°/77°°F 0 mm 0% 7 mph 20% 1012 mb 0 mm/h