 |
 Fullerton Weather Forecast Summary |
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Today
Dec 27th
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Sunday
Dec 28th
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Monday
Dec 29th
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Tuesday
Dec 30th
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Wednesday
Dec 31st
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Mostly Sunny |
Mostly Sunny |
Cloudy |
Cloudy |
Showers |
59°F
|
67°F
51°F |
67°F
54°F |
69°F
55°F |
70°F
56°F |
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| Fullerton Detailed Weather Forecast |
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| Saturday, December 27th, 2025 |
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Morning |
Temperature: 57°F |
| Sunny. |
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Afternoon |
Temperature: 58°F |
| Sunny. |
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Evening |
Temperature: 53°F |
| Clear with cloudy periods. |
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| Sunday, December 28th, 2025 |
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Overnight |
Temperature: 51°F |
| Clear. |
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Morning |
Temperature: 63°F |
| Sunny. |
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Afternoon |
Temperature: 62°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 55°F |
| Clear with cloudy periods. |
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| Monday, December 29th, 2025 |
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Overnight |
Temperature: 55°F |
| Clear. Windy at times. |
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Morning |
Temperature: 65°F |
| Sunny. Windy. |
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Afternoon |
Temperature: 63°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 56°F |
| Cloudy. |
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| Tuesday, December 30th, 2025 |
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Overnight |
Temperature: 55°F |
| Cloudy. |
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Morning |
Temperature: 65°F |
| Cloudy. |
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Afternoon |
Temperature: 63°F |
| Cloudy. |
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Evening |
Temperature: 60°F |
| Cloudy. |
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| Wednesday, December 31st, 2025 |
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Overnight |
Temperature: 59°F |
| Cloudy. |
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Morning |
Temperature: 68°F |
| Cloudy. |
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Afternoon |
Temperature: 62°F |
| Cloudy with a chance of showers. |
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Evening |
Temperature: 56°F |
| Cloudy with a few showers. |
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| Thursday, January 1st, 2026 |
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Overnight |
Temperature: 58°F |
| Cloudy with a few showers. |
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Morning |
Temperature: 61°F |
| Cloudy with showers likely. |
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Afternoon |
Temperature: 60°F |
| Cloudy with showers. |
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Evening |
Temperature: 60°F |
| Cloudy with a few showers. |
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| Friday, January 2nd, 2026 |
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Overnight |
Temperature: 59°F |
| Cloudy with a slight chance of showers. |
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Morning |
Temperature: 64°F |
| A mix of cloud and sun with a slight chance of showers. |
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Afternoon |
Temperature: 64°F |
| A mix of sun and cloud with a chance of showers. |
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Evening |
Temperature: 60°F |
| Cloudy. |
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| Saturday, January 3rd, 2026 |
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Overnight |
Temperature: 58°F |
| Cloudy. |
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Morning |
Temperature: 65°F |
| Cloudy. |
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Afternoon |
Temperature: 65°F |
| A mix of cloud and sun. |
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Evening |
Temperature: 60°F |
| Cloudy. |
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| Sunday, January 4th, 2026 |
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Overnight |
Temperature: 58°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 64°F |
| Cloudy. |
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Afternoon |
Temperature: 63°F |
| Cloudy. |
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Evening |
Temperature: 59°F |
| Clear. |
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