September 14, 2026 9:36 PM

More Nice Weather in this Week 5 Day Forecast

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week’s weather forecast for Monday May 18 through Friday May 22 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 warm, sunny, and a high of 82°. Tuesday will be hot, sunny, with a high of 86°. Wednesday will be hot, sunny, and a high of 88°. Thursday will be warm, sunny, and a high of 87°. Friday will be warm, mostly sunny, and a high of 85°.

High Deserts Area Average Weather/Temps:

Monday will be warm, sunny, windy, and a high of 78+°. Tuesday will be hot, sunny, windy, and a high of 86+°. Wednesday will be hot, sunny, windy and a high of 89+°. Thursday will be hot, sunny, windy, and a high of 91+°. 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 cold, sunny, windy, and a high of 58°. Tuesday will be cool, sunny, windy, and a high of 65°. Wednesday will be cool, sunny, windy, and a high of 70°. Thursday will be cool, mostly sunny, windy and a high of 72°. Friday will be cool, mostly sunny, windy, and a high of 72°.

*Timing of the Weather on each day can change.

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Cajon Pass
9:36 pm, Sep 14, 2026
temperature icon 70°F
clear sky
Humidity: 47 %
Pressure: 1010 mb
Wind: 16 mph
Wind Gust: 22 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 6:32 am
Sunset: 6:58 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
11:00 pm
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61°/67°°F 0 mm 0% 6 mph 51% 1010 mb 0 mm/h
2:00 am
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59°/63°°F 0 mm 0% 5 mph 58% 1011 mb 0 mm/h
5:00 am
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56°/56°°F 0 mm 0% 4 mph 68% 1012 mb 0 mm/h
8:00 am
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60°/60°°F 0 mm 0% 3 mph 46% 1013 mb 0 mm/h
11:00 am
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70°/70°°F 0 mm 0% 9 mph 20% 1012 mb 0 mm/h
2:00 pm
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78°/78°°F 0 mm 0% 15 mph 18% 1011 mb 0 mm/h
5:00 pm
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73°/73°°F 0 mm 0% 15 mph 23% 1010 mb 0 mm/h
8:00 pm
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63°/63°°F 0 mm 0% 11 mph 51% 1012 mb 0 mm/h