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 Fullerton Weather Forecast Summary |
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Today
Jan 7th
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Thursday
Jan 8th
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Friday
Jan 9th
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Saturday
Jan 10th
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Sunday
Jan 11th
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Cloudy |
Mostly Sunny |
Sunny |
Mostly Sunny |
Mostly Sunny |
35°C
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37°C
20°C |
38°C
22°C |
36°C
20°C |
31°C
11°C |
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| Fullerton Detailed Weather Forecast |
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| Wednesday, January 7th, 2026 |
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Afternoon |
Temperature: 31°C |
| Cloudy. |
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Evening |
Temperature: 24°C |
| Clear with cloudy periods. |
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| Thursday, January 8th, 2026 |
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Overnight |
Temperature: 23°C |
| Clear. |
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Morning |
Temperature: 35°C |
| Sunny. |
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Afternoon |
Temperature: 33°C |
| Sunny with cloudy periods. Slight chance of a thunderstorm. |
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Evening |
Temperature: 24°C |
| Clear. |
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| Friday, January 9th, 2026 |
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Overnight |
Temperature: 25°C |
| Clear. |
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Morning |
Temperature: 36°C |
| Sunny. Slight chance of a thunderstorm. |
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Afternoon |
Temperature: 35°C |
| Sunny. Windy at times. |
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Evening |
Temperature: 24°C |
| Clear. |
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| Saturday, January 10th, 2026 |
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Overnight |
Temperature: 24°C |
| Clear. |
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Morning |
Temperature: 34°C |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 34°C |
| Sunny with cloudy periods. Windy at times. |
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Evening |
Temperature: 21°C |
| Clear with cloudy periods. |
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| Sunday, January 11th, 2026 |
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Overnight |
Temperature: 18°C |
| Clear with cloudy periods. |
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Morning |
Temperature: 29°C |
| Sunny. |
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Afternoon |
Temperature: 19°C |
| Sunny. Windy at times. |
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Evening |
Temperature: 12°C |
| Clear. Windy at times. |
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| Monday, January 12th, 2026 |
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Overnight |
Temperature: 13°C |
| Clear. |
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Morning |
Temperature: 28°C |
| Sunny. |
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Afternoon |
Temperature: 26°C |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 15°C |
| Clear with a chance of showers. |
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| Tuesday, January 13th, 2026 |
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Overnight |
Temperature: 15°C |
| Clear with showers likely. |
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Morning |
Temperature: 25°C |
| Cloudy with a chance of showers. Slight chance of a thunderstorm. |
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Afternoon |
Temperature: 21°C |
| Sunny with cloudy periods with showers likely. Chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 17°C |
| A mix of cloudy and clear skies with showers likely. |
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| Wednesday, January 14th, 2026 |
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Overnight |
Temperature: 17°C |
| Cloudy with a chance of showers. Slight chance of a thunderstorm. |
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Morning |
Temperature: 27°C |
| Sunny with cloudy periods with showers likely. Chance of a thunderstorm. Windy at times. |
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Afternoon |
Temperature: 20°C |
| Sunny with cloudy periods with a chance of showers or thundershowers. Windy at times. |
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Evening |
Temperature: 13°C |
| Cloudy with a chance of showers. Windy at times. |
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| Thursday, January 15th, 2026 |
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Overnight |
Temperature: 14°C |
| Cloudy. Windy at times. |
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Morning |
Temperature: 19°C |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 18°C |
| Sunny with cloudy periods. Windy at times. |
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Evening |
Temperature: 14°C |
| Cloudy. Windy at times. |
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