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Today Hourly 7 days 30 days December
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December 2025 Weather | Fullerton, California

Today 12/24
Rainy Weather
Day 64°
Night 54°
100
Thu 12/25
Rainy Weather
Day 66°
Night 55°
95
Fri 12/26
Rainy Weather
Day 63°
Night 48°
95
Sat 12/27
Partly Sunny with Showers
Day 66°
Night 45°
84
Sun 12/28
Sunny Weather
Day 72°
Night 46°
3
Mon 12/29
Sunny Weather
Day 75°
Night 48°
4
Tue 12/30
Sunny Weather
Day 73°
Night 50°
15
Wed 12/31
Rainy Weather
Day 70°
Night 52°
55