August 19, 2026 7:40 AM

Fall like Temps in the 5 Day Forecast

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week’s weather forecast for Monday September 22 through Friday September 26 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, partly sunny with a chance of rain showers and thunderstorms, and a high of 90°. Tuesday will be hot, partly sunny with a chance of rain showers and thunderstorms, with a high of 94°. Wednesday will be hot, mostly sunny with a chance of rain showers and thunderstorms, and a high of 90°. Thursday will be hot, mostly sunny, and a high of 87°. Friday will be hot, mostly sunny, and a high of 84°.

High Deserts Area Average Weather/Temps:

Monday will be hot, partly sunny with a chance of rain showers and thunderstorms, windy, and a high of 92+°. Tuesday will be hot, partly sunny with a chance of rain showers and thunderstorms, windy, and a high of 90+°. Wednesday will be hot, partly sunny with a chance of rain showers and thunderstorms, windy and a high of 86+°. Thursday will be hot, mostly sunny, windy, and a high of 88+°. Friday will be hot, mostly sunny, windy, and a high 89+°. Higher temps in the Barstow area.

Mountains Area Average Weather/Temps:

Monday will be warm, partly sunny with a chance of rain showers and thunderstorms, windy, and a high of 70°. Tuesday will be warm, partly sunny with a chance of rain showers and thunderstorms, windy, and a high of 74°. Wednesday will be warm, partly sunny with a chance of rain showers and thunderstorms, windy and a high of 73°. Thursday will be warm, mostly sunny, windy, and a high of 70°. Friday will be warm, mostly sunny, windy, and a high of 68°.

*Timing of the Weather on each day can change.

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Cajon Pass
7:40 am, Aug 19, 2026
temperature icon 77°F
few clouds
Humidity: 19 %
Pressure: 1014 mb
Wind: 1 mph
Wind Gust: 4 mph
Clouds: 20%
Visibility: 10 km
Sunrise: 6:13 am
Sunset: 7:32 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
8:00 am
temperature icon
66°/77°°F 0 mm 0% 2 mph 19% 1014 mb 0 mm/h
11:00 am
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79°/85°°F 0 mm 0% 6 mph 20% 1014 mb 0 mm/h
2:00 pm
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87°/93°°F 0 mm 0% 15 mph 13% 1012 mb 0 mm/h
5:00 pm
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89°/89°°F 0 mm 0% 15 mph 12% 1010 mb 0 mm/h
8:00 pm
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77°/77°°F 0 mm 0% 8 mph 30% 1012 mb 0 mm/h
11:00 pm
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70°/70°°F 0 mm 0% 4 mph 36% 1014 mb 0 mm/h
2:00 am
temperature icon
67°/67°°F 0 mm 0% 3 mph 34% 1014 mb 0 mm/h
5:00 am
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64°/64°°F 0 mm 0% 1 mph 32% 1014 mb 0 mm/h