June 13, 2026 2:49 AM

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.

There are more ways to follow the Pain In The Pass. Join the Traffic Group on Facebook with over 162,000 members. Join the group on MeWe. Like us on the NEW page on Facebook. Follow us on Instagram, and also follow us on Threads, and X aka Twitter.

loader-image
Cajon Pass
2:49 am, Jun 13, 2026
temperature icon 67°F
clear sky
Humidity: 47 %
Pressure: 1012 mb
Wind: 10 mph
Wind Gust: 13 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 5:36 am
Sunset: 8:02 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
5:00 am
temperature icon
59°/65°°F 0 mm 0% 4 mph 49% 1011 mb 0 mm/h
8:00 am
temperature icon
70°/71°°F 0 mm 0% 4 mph 33% 1012 mb 0 mm/h
11:00 am
temperature icon
79°/79°°F 0 mm 0% 9 mph 21% 1011 mb 0 mm/h
2:00 pm
temperature icon
82°/82°°F 0 mm 0% 11 mph 19% 1010 mb 0 mm/h
5:00 pm
temperature icon
77°/77°°F 0 mm 0% 17 mph 23% 1009 mb 0 mm/h
8:00 pm
temperature icon
71°/71°°F 0 mm 0% 11 mph 40% 1011 mb 0 mm/h
11:00 pm
temperature icon
65°/65°°F 0 mm 0% 7 mph 49% 1013 mb 0 mm/h
2:00 am
temperature icon
64°/64°°F 0 mm 0% 6 mph 46% 1012 mb 0 mm/h