April 13, 2026 3:50 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
3:50 pm, Apr 13, 2026
temperature icon 51°F
overcast clouds
Humidity: 61 %
Pressure: 1014 mb
Wind: 7 mph
Wind Gust: 11 mph
Clouds: 92%
Visibility: 10 km
Sunrise: 6:20 am
Sunset: 7:19 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
5:00 pm
temperature icon
51°/51°°F 1 mm 100% 9 mph 55% 1014 mb 0 mm/h
8:00 pm
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47°/50°°F 0.32 mm 32% 8 mph 58% 1015 mb 0 mm/h
11:00 pm
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45°/47°°F 0 mm 0% 8 mph 69% 1016 mb 0 mm/h
2:00 am
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44°/44°°F 0 mm 0% 7 mph 83% 1018 mb 0 mm/h
5:00 am
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42°/42°°F 0 mm 0% 2 mph 82% 1018 mb 0 mm/h
8:00 am
temperature icon
46°/46°°F 0 mm 0% 2 mph 62% 1019 mb 0 mm/h
11:00 am
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55°/55°°F 0 mm 0% 2 mph 43% 1018 mb 0 mm/h
2:00 pm
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62°/62°°F 0 mm 0% 3 mph 33% 1016 mb 0 mm/h