Weather in Fullerton, CA
Fullerton, Tuesday, 13 October, 08:16
Clear. Feels like 58°. High 74°, low 56°.
Monthly outlook for Fullerton, CA: average high 81.3°, average low 65.7°. That is 1.7° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 16 October (94.3°), the coolest 13 October (55.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 October – 22 October | 81.6° | 78.9° | +1.5° |
| 23 October – 1 November | 80.7° | 76.6° | +2.3° |
| 2 November – 11 November | at normal | 73.7° | — |
October records over 66 years
0Fullerton, Wednesday, 14 October
Clear. High 82°, low 57°.
0Fullerton, Thursday, 15 October
Clear. High 91°, low 60°.
0Fullerton, Friday, 16 October
Clear. High 94°, low 66°.
0Fullerton, Saturday, 17 October
Clear. High 92°, low 71°.
0Fullerton, Sunday, 18 October
Clear. High 86°, low 69°.
0
Fullerton, Monday, 19 October
Mostly clear. High 78°, low 67°.
0.07
Fullerton, Tuesday, 20 October
Light rain. High 71°, low 66°.
0Fullerton, Wednesday, 21 October
Clear. High 72°, low 64°.
0Fullerton, Thursday, 22 October
Clear. High 76°, low 65°.
0Fullerton, Friday, 23 October
Clear. High 85°, low 67°.
0Fullerton, Saturday, 24 October
Clear. High 79°, low 69°.
0Fullerton, Sunday, 25 October
Clear. High 84°, low 70°.
0Fullerton, Monday, 26 October
Clear. High 79°, low 68°.
0
Fullerton, Tuesday, 27 October
Overcast. High 79°, low 67°.
0
Fullerton, Wednesday, 28 October
Partly cloudy. High 77°, low 67°.
0Fullerton, Thursday, 29 October
Climate normal for this date — 60-year average.
0.05Fullerton, Friday, 30 October
Climate normal for this date — 60-year average.
0.02Fullerton, Saturday, 31 October
Climate normal for this date — 60-year average.
0.03Fullerton, Sunday, 1 November
Climate normal for this date — 60-year average.
0.01Fullerton, Monday, 2 November
Climate normal for this date — 60-year average.
0Fullerton, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Fullerton, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.01Fullerton, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Fullerton, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Fullerton, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09Fullerton, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Fullerton, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Fullerton, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.05Fullerton, Wednesday, 11 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Fullerton, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Fullerton, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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