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Simi Valley, California Weather:
Thursday, December 18, 2025
Cloudy Weather
Day 73°
Night 50°
Precipitation 4 %
Wind 6 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (December 18, 2024)
Sunny Weather

Day

79°

Night

54°

Wind

12 mph

UV Index

3

Precipitation

0 %