April 2, 2026 4:29 PM

Hot August Nights to Start, then Ends the Month Little Cooler

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week’s weather forecast for Monday August 25 through Friday August 29 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 with a small chance of thunderstorms, and a high of 98°. Tuesday will be hot, mostly sunny with a small chance of thunderstorms, with a high of 94°. Wednesday will be hot, mostly sunny, and a high of 94°. Thursday will be hot, mostly sunny, and a high of 92°. Friday will be hot, and a high of 91°.

High Deserts Area Average Weather/Temps:

Monday will be hot, mostly sunny with a chance of thunderstorms, windy, and a high of 98+°. Tuesday will be hot, mostly sunny with a chance of thunderstorms, windy, and a high of 95+°. Wednesday will be hot, mostly sunny with a small chance of thunderstorms, windy and a high of 95+°. Thursday will be hot, mostly sunny, windy, and a high of 93+°. Friday will be hot, mostly sunny , windy, and a high 92+°. 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 78°. Wednesday will be warm, mostly sunny with a small chance of thunderstorms, windy and a high of 78°. Thursday will be warm, mostly sunny with a chance of thunderstorms, windy, and a high of 75°. Friday will be warm, mostly sunny with a chance of thunderstorms, windy, and a high of 74°.

*Timing of the Weather on each day can change.

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Cajon Pass
4:29 pm, Apr 2, 2026
temperature icon 60°F
broken clouds
Humidity: 45 %
Pressure: 1009 mb
Wind: 15 mph
Wind Gust: 21 mph
Clouds: 80%
Visibility: 10 km
Sunrise: 6:35 am
Sunset: 7:10 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
5:00 pm
temperature icon
55°/60°°F 0 mm 0% 7 mph 45% 1009 mb 0 mm/h
8:00 pm
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50°/57°°F 0 mm 0% 2 mph 51% 1010 mb 0 mm/h
11:00 pm
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48°/52°°F 0 mm 0% 2 mph 65% 1013 mb 0 mm/h
2:00 am
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45°/45°°F 0 mm 0% 7 mph 70% 1015 mb 0 mm/h
5:00 am
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47°/47°°F 0 mm 0% 8 mph 61% 1016 mb 0 mm/h
8:00 am
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51°/51°°F 0 mm 0% 14 mph 29% 1019 mb 0 mm/h
11:00 am
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57°/57°°F 0 mm 0% 19 mph 16% 1020 mb 0 mm/h
2:00 pm
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64°/64°°F 0 mm 0% 19 mph 12% 1018 mb 0 mm/h