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Climate chart Fullerton

Jan.

max 64°F min 52°F

10

Feb.

max 64°F min 50°F

11

Mar.

max 73°F min 55°F

4

Apr.

max 77°F min 57°F

1

May.

max 77°F min 59°F

0

Jun.

max 88°F min 66°F

0

Jul.

max 88°F min 68°F

1

Aug.

max 90°F min 72°F

1

Sep.

max 90°F min 73°F

3

Oct.

max 82°F min 66°F

3

Nov.

max 72°F min 57°F

3

Dec.

max 72°F min 61°F

3

Weekly overview Fullerton

Weather Fullerton 14 days

Thursday 18-09-2025 Partly cloudy 68°F / 91°F

Friday 19-09-2025 Partly cloudy 68°F / 93°F

Saturday 20-09-2025 Partly cloudy 70°F / 95°F

Sunday 21-09-2025 Patchy rain possible 73°F / 91°F

Monday 22-09-2025 Patchy rain possible 73°F / 88°F

Tuesday 23-09-2025 Patchy rain possible 72°F / 88°F

Wednesday 24-09-2025 Patchy rain possible 72°F / 82°F

Thursday 25-09-2025 Patchy rain possible 73°F / 86°F

Friday 26-09-2025 Patchy rain possible 75°F / 88°F

Saturday 27-09-2025 Sunny/Clear 77°F / 90°F

Sunday 28-09-2025 Patchy rain possible 77°F / 93°F

Monday 29-09-2025 Patchy rain possible 75°F / 90°F

Tuesday 30-09-2025 Patchy rain possible 75°F / 90°F

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