October 18, 2026 4:11 PM

A Chance of More Rain Showers in the Middle of the 5 Day Forecast

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week weather forecast for Monday September 7 through Friday September 11 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, and a high 92°. Tuesday will be hot, partly cloudly with a chance of rain showers, and the high of 95°. Wednesday will be hot, partly cloudly with a chance of rain showers, and a high of 98°. Thursday will be hot, mostly sunny with a chance of rain showers, and a high of 97°. Friday will be hot, mostly sunny, and a high of 95°.  

High Deserts Area Average Weather/Temps:

Monday will be hot, partly sunny, windy, and a high of 90+°. Tuesday will be hot, partly cloudy with a chance of thunderstorms, windy, and a high of 95+°. Wednesday will be hot, partly cloudy with a chance of thunderstorms, windy and a high of 93+°. Thursday will be hot, mostly sunny with a chance of thunderstorms, windy, and a high of 94+°. Friday will be hot, mostly sunny, windy, and a high 96+°. Higher temps in the Barstow area.

Mountains Area Average Weather/Temps:

Monday will be warm, partly sunny, windy, and a high of 72°. Tuesday will be warm, partly sunny with a chance of thunderstorms, windy, and a high of 75°. Wednesday will be warm, partly cloudy with a chance of thunderstorms, windy, and a high of 77°. Thursday will be warm, partly sunny with a chance of thunderstorms, windy and a high of 78°. Friday will be warm, mostly sunny, windy, and a high of 77°.

*Timing of the Weather on each day can change.

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Cajon Pass
4:11 pm, Oct 18, 2026
temperature icon 74°F
clear sky
Humidity: 20 %
Pressure: 1014 mb
Wind: 4 mph
Wind Gust: 9 mph
Clouds: 9%
Visibility: 10 km
Sunrise: 6:57 am
Sunset: 6:11 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
5:00 pm
temperature icon
72°/74°°F 0 mm 0% 3 mph 20% 1014 mb 0 mm/h
8:00 pm
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65°/71°°F 0 mm 0% 0 mph 23% 1014 mb 0 mm/h
11:00 pm
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59°/64°°F 0 mm 0% 1 mph 29% 1015 mb 0 mm/h
2:00 am
temperature icon
57°/57°°F 0 mm 0% 1 mph 33% 1015 mb 0 mm/h
5:00 am
temperature icon
58°/58°°F 0 mm 0% 1 mph 37% 1015 mb 0 mm/h
8:00 am
temperature icon
60°/60°°F 0 mm 0% 1 mph 33% 1015 mb 0 mm/h
11:00 am
temperature icon
69°/69°°F 0 mm 0% 5 mph 22% 1015 mb 0 mm/h
2:00 pm
temperature icon
73°/73°°F 0 mm 0% 5 mph 19% 1012 mb 0 mm/h