May 31, 2026 1:00 PM

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
1:00 pm, May 31, 2026
temperature icon 79°F
clear sky
Humidity: 15 %
Pressure: 1012 mb
Wind: 5 mph
Wind Gust: 0 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 5:38 am
Sunset: 7:55 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
2:00 pm
temperature icon
75°/79°°F 0 mm 0% 11 mph 15% 1011 mb 0 mm/h
5:00 pm
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75°/78°°F 0 mm 0% 13 mph 16% 1011 mb 0 mm/h
8:00 pm
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65°/70°°F 0 mm 0% 7 mph 27% 1011 mb 0 mm/h
11:00 pm
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58°/58°°F 0 mm 0% 4 mph 41% 1013 mb 0 mm/h
2:00 am
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54°/54°°F 0 mm 0% 2 mph 39% 1012 mb 0 mm/h
5:00 am
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52°/52°°F 0 mm 0% 2 mph 38% 1012 mb 0 mm/h
8:00 am
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69°/69°°F 0 mm 0% 2 mph 23% 1013 mb 0 mm/h
11:00 am
temperature icon
79°/79°°F 0 mm 0% 6 mph 21% 1012 mb 0 mm/h