Weather in Fountain Valley, CA
Fountain Valley, Sunday, 9 August, 00:28
Clear. Feels like 73°. High 97°, low 70°.
Monthly outlook for Fountain Valley, CA: average high 79.9°, average low 70.6°. That is 0.6° 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 9 August (97.3°), the coolest 14 August (68.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.8° | 78.9° | +1.1° |
| 19 August – 28 August | 78.5° | 79.4° | -0.5° |
| 29 August – 7 September | at normal | 80.5° | — |
August records over 66 years
0
Fountain Valley, Monday, 10 August
Partly cloudy. High 95°, low 71°.
0
Fountain Valley, Tuesday, 11 August
Mostly clear. High 79°, low 72°.
0Fountain Valley, Wednesday, 12 August
Partly cloudy. High 78°, low 70°.
0Fountain Valley, Thursday, 13 August
Partly cloudy. High 75°, low 68°.
0
Fountain Valley, Friday, 14 August
Overcast. High 75°, low 68°.
0Fountain Valley, Saturday, 15 August
Overcast. High 76°, low 70°.
0Fountain Valley, Sunday, 16 August
Overcast. High 78°, low 71°.
0Fountain Valley, Monday, 17 August
Overcast. High 79°, low 71°.
0Fountain Valley, Tuesday, 18 August
Overcast. High 77°, low 71°.
0Fountain Valley, Wednesday, 19 August
Overcast. High 78°, low 71°.
0
Fountain Valley, Thursday, 20 August
Clear. High 79°, low 71°.
0Fountain Valley, Friday, 21 August
Partly cloudy. High 80°, low 71°.
0Fountain Valley, Saturday, 22 August
Clear. High 80°, low 72°.
0Fountain Valley, Sunday, 23 August
Clear. High 77°, low 70°.
0Fountain Valley, Monday, 24 August
Clear. High 78°, low 70°.
0Fountain Valley, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Fountain Valley, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Fountain Valley, Thursday, 27 August
Climate normal for this date — 60-year average.
0Fountain Valley, Friday, 28 August
Climate normal for this date — 60-year average.
0Fountain Valley, Saturday, 29 August
Climate normal for this date — 60-year average.
0Fountain Valley, Sunday, 30 August
Climate normal for this date — 60-year average.
0Fountain Valley, Monday, 31 August
Climate normal for this date — 60-year average.
0.02Fountain Valley, Tuesday, 1 September
Climate normal for this date — 60-year average.
0Fountain Valley, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Fountain Valley, Thursday, 3 September
Climate normal for this date — 60-year average.
0Fountain Valley, Friday, 4 September
Climate normal for this date — 60-year average.
0.01Fountain Valley, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01Fountain Valley, Sunday, 6 September
Climate normal for this date — 60-year average.
0Fountain Valley, Monday, 7 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 Fountain Valley, 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 Fountain Valley, 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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