October 16, 2026 1:38 PM

More Sunny Days in December this weeks 5 Day Forecast

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> This week’s weather forecast for Monday December 15 through Friday December 19 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 warm, sunny, with a high of 83°. Wednesday will be warm, mostly sunny, and a high of 79°. Thursday will be warm, sunny with morning fog, and a high of 81°. Friday will be warm, mostly sunny with morning fog, and a high of 79°.

High Deserts Area Average Weather/Temps:

Monday will be cool, sunny, windy, and a high of 69+°. Tuesday will be cool, sunny, windy, and a high of 70+°. 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, mosty sunny, windy, and a high 69+°. Higher temps in the Barstow area.

Mountains Area Average Weather/Temps:

Monday will be cold, sunny, windy, and a high of 61°. Tuesday will be cold, sunny, windy, and a high of 65°. Wednesday will be cold, sunny, windy and a high of 61°. Thursday will be cold, mostly sunny, windy, and a high of 62°. Friday will be cold, mostly sunny, windy, and a high of 62°.

*Timing of the Weather on each day can change.

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Cajon Pass
1:38 pm, Oct 16, 2026
temperature icon 74°F
clear sky
Humidity: 23 %
Pressure: 1019 mb
Wind: 13 mph
Wind Gust: 0 mph
Clouds: 4%
Visibility: 10 km
Sunrise: 6:55 am
Sunset: 6:14 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
2:00 pm
temperature icon
74°/79°°F 0 mm 0% 14 mph 23% 1019 mb 0 mm/h
5:00 pm
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76°/78°°F 0 mm 0% 14 mph 25% 1019 mb 0 mm/h
8:00 pm
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70°/72°°F 0 mm 0% 8 mph 31% 1020 mb 0 mm/h
11:00 pm
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68°/68°°F 0 mm 0% 6 mph 39% 1022 mb 0 mm/h
2:00 am
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65°/65°°F 0 mm 0% 7 mph 39% 1021 mb 0 mm/h
5:00 am
temperature icon
60°/60°°F 0 mm 0% 6 mph 41% 1021 mb 0 mm/h
8:00 am
temperature icon
65°/65°°F 0 mm 0% 3 mph 34% 1021 mb 0 mm/h
11:00 am
temperature icon
73°/73°°F 0 mm 0% 15 mph 23% 1021 mb 0 mm/h