Weather in Fullerton, CA
Fullerton, Saturday, 8 August, 15:33
Clear. Feels like 98°. High 96°, low 70°.
Monthly outlook for Fullerton, CA: average high 87.8°, average low 72.1°. That is 0.4° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 8 August (95.6°), the coolest 14 August (69.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 88.3° | 87.5° | +0.5° |
| 18 August – 27 August | 87° | 87.4° | -0.2° |
| 28 August – 6 September | at normal | 89.2° | — |
August records over 66 years
0Fullerton, Sunday, 9 August
Clear. High 96°, low 71°.
0
Fullerton, Monday, 10 August
Overcast. High 88°, low 72°.
0Fullerton, Tuesday, 11 August
Overcast. High 86°, low 74°.
0
Fullerton, Wednesday, 12 August
Partly cloudy. High 86°, low 72°.
0Fullerton, Thursday, 13 August
Overcast. High 83°, low 71°.
0Fullerton, Friday, 14 August
Overcast. High 84°, low 70°.
0Fullerton, Saturday, 15 August
Partly cloudy. High 88°, low 71°.
0Fullerton, Sunday, 16 August
Partly cloudy. High 88°, low 72°.
0
Fullerton, Monday, 17 August
Mostly clear. High 89°, low 72°.
0Fullerton, Tuesday, 18 August
Clear. High 91°, low 74°.
0Fullerton, Wednesday, 19 August
Clear. High 89°, low 74°.
0Fullerton, Thursday, 20 August
Partly cloudy. High 88°, low 74°.
0Fullerton, Friday, 21 August
Partly cloudy. High 87°, low 73°.
0Fullerton, Saturday, 22 August
Overcast. High 83°, low 73°.
0Fullerton, Sunday, 23 August
Clear. High 84°, low 71°.
0Fullerton, Monday, 24 August
Climate normal for this date — 60-year average.
0Fullerton, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Fullerton, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Fullerton, Thursday, 27 August
Climate normal for this date — 60-year average.
0Fullerton, Friday, 28 August
Climate normal for this date — 60-year average.
0Fullerton, Saturday, 29 August
Climate normal for this date — 60-year average.
0Fullerton, Sunday, 30 August
Climate normal for this date — 60-year average.
0Fullerton, Monday, 31 August
Climate normal for this date — 60-year average.
0.02Fullerton, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.02Fullerton, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Fullerton, Thursday, 3 September
Climate normal for this date — 60-year average.
0Fullerton, Friday, 4 September
Climate normal for this date — 60-year average.
0.01Fullerton, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01Fullerton, Sunday, 6 September
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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