August 31, 2026 11:19 PM

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

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week weather forecast for Monday August 31 through Friday September 4 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 96°. Tuesday will be hot, mostly cloudly with a chance of thunderstorms, and the high of 93°. Wednesday will be hot, mostly cloudly with a chance of thunderstorms, and a high of 93°. Thursday will be hot, mostly sunny, and a high of 94°. Friday will be hot, mostly sunny, and a high of 95°. 

High Deserts Area Average Weather/Temps:

Monday will be hot, mostly sunny, windy, and a high of 98+°. Tuesday will be hot, partly cloudy with a chance of thunderstorms, windy, and a high of 93+°. 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, mostly sunny, windy, and a high of 76°. Tuesday will be warm, partly sunny with a chance of thunderstorms, windy, and a high of 74°. Wednesday will be warm, partly cloudy with a chance of thunderstorms, windy, and a high of 74°. Thursday will be warm, partly cloudy with a chance of thunderstorms, windy and a high of 77°. Friday will be warm, mostly sunny, windy, and a high of 79°.

*Timing of the Weather on each day can change.

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Cajon Pass
11:19 pm, Aug 31, 2026
temperature icon 65°F
clear sky
Humidity: 23 %
Pressure: 1014 mb
Wind: 12 mph
Wind Gust: 9 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 6:22 am
Sunset: 7:17 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
2:00 am
temperature icon
60°/63°°F 0 mm 0% 8 mph 31% 1014 mb 0 mm/h
5:00 am
temperature icon
57°/60°°F 0 mm 0% 8 mph 41% 1014 mb 0 mm/h
8:00 am
temperature icon
65°/65°°F 0 mm 0% 7 mph 33% 1015 mb 0 mm/h
11:00 am
temperature icon
76°/76°°F 0 mm 0% 13 mph 15% 1014 mb 0 mm/h
2:00 pm
temperature icon
78°/78°°F 0 mm 0% 20 mph 15% 1012 mb 0 mm/h
5:00 pm
temperature icon
73°/73°°F 0 mm 0% 19 mph 17% 1012 mb 0 mm/h
8:00 pm
temperature icon
64°/64°°F 0 mm 0% 11 mph 32% 1014 mb 0 mm/h
11:00 pm
temperature icon
60°/60°°F 0 mm 0% 10 mph 42% 1016 mb 0 mm/h