April 6, 2026 1:10 PM

The Heat is Back in this Weeks 5 Day Forecast

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week’s weather forecast for Monday August 18 through Friday August 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 hot, sunny, and a high of 93°. Tuesday will be hot, sunny, with a high of 93°. Wednesday will be hot, sunny, and a high of 97°. Thursday will be HOT, mostly sunny with a small chance of thunderstorms, and a high of 101°. Friday will be HOT, mostly sunny with a small chance of thunderstorms, and a high of 101°.

High Deserts Area Average Weather/Temps:

Monday will be hot, sunny, windy, and a high of 96+°. Tuesday will be hot, sunny, windy, and a high of 98+°. Wednesday will be hot, mostly sunny with a small chance of thunderstorms, windy and a high of 104+°. Thursday will be hot, mostly sunny with a chance of thunderstorms, windy, and a high of 107+°. Friday will be hot, mostly sunny with a chance of thunderstorms, windy, and a high 107+°. Higher temps in the Barstow area.

Mountains Area Average Weather/Temps:

Monday will be warm, sunny, windy, and a high of 80°. Tuesday will be warm, sunny, windy, and a high of 81°. Wednesday will be warm, mostly sunny with a small chance of thunderstorms, windy and a high of 84°. Thursday will be warm, mostly sunny with a chance of thunderstorms, windy, and a high of 86°. Friday will be warm, mostly sunny with a chance of thunderstorms, windy, and a high of 86°.

*Timing of the Weather on each day can change.

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Cajon Pass
1:10 pm, Apr 6, 2026
temperature icon 62°F
broken clouds
Humidity: 18 %
Pressure: 1014 mb
Wind: 3 mph
Wind Gust: 6 mph
Clouds: 76%
Visibility: 10 km
Sunrise: 6:29 am
Sunset: 7:13 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
2:00 pm
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70°/70°°F 0 mm 0% 3 mph 17% 1013 mb 0 mm/h
5:00 pm
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70°/71°°F 0 mm 0% 8 mph 19% 1013 mb 0 mm/h
8:00 pm
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56°/61°°F 0 mm 0% 6 mph 36% 1014 mb 0 mm/h
11:00 pm
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57°/57°°F 0 mm 0% 6 mph 53% 1015 mb 0 mm/h
2:00 am
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54°/54°°F 0 mm 0% 5 mph 55% 1015 mb 0 mm/h
5:00 am
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43°/43°°F 0 mm 0% 3 mph 55% 1014 mb 0 mm/h
8:00 am
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60°/60°°F 0 mm 0% 3 mph 37% 1015 mb 0 mm/h
11:00 am
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71°/71°°F 0 mm 0% 3 mph 25% 1014 mb 0 mm/h