Weather in Rancho Mission Viejo, CA
Rancho Mission Viejo, Sunday, 9 August, 13:16
Mostly clear. Feels like 91°. High 90°, low 70°.
Monthly outlook for Rancho Mission Viejo, CA: average high 83.4°, average low 65°. That is 2° above the climate normal for August. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 10 August (91.2°), the coolest 15 August (58.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 81.6° | 79.9° | +1° |
| 19 August – 28 August | 86.4° | 80.4° | +3.4° |
| 29 August – 7 September | at normal | 81.8° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Mission Viejo (9 mi).
0Rancho Mission Viejo, Monday, 10 August
Mostly clear. High 91°, low 67°.
0
Rancho Mission Viejo, Tuesday, 11 August
Overcast. High 84°, low 66°.
0Rancho Mission Viejo, Wednesday, 12 August
Overcast. High 82°, low 64°.
0
Rancho Mission Viejo, Thursday, 13 August
Partly cloudy. High 76°, low 60°.
0Rancho Mission Viejo, Friday, 14 August
Mostly clear. High 76°, low 59°.
0Rancho Mission Viejo, Saturday, 15 August
Overcast. High 77°, low 59°.
0
Rancho Mission Viejo, Sunday, 16 August
Clear. High 79°, low 61°.
0Rancho Mission Viejo, Monday, 17 August
Clear. High 80°, low 60°.
0Rancho Mission Viejo, Tuesday, 18 August
Clear. High 82°, low 59°.
0Rancho Mission Viejo, Wednesday, 19 August
Overcast. High 86°, low 65°.
0.01
Rancho Mission Viejo, Thursday, 20 August
Light rain. High 89°, low 70°.
0.04Rancho Mission Viejo, Friday, 21 August
Light rain. High 88°, low 73°.
0.01Rancho Mission Viejo, Saturday, 22 August
Light rain. High 86°, low 71°.
0Rancho Mission Viejo, Sunday, 23 August
Clear. High 85°, low 68°.
0Rancho Mission Viejo, Monday, 24 August
Partly cloudy. High 85°, low 68°.
0Rancho Mission Viejo, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Thursday, 27 August
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Friday, 28 August
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Saturday, 29 August
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Sunday, 30 August
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Monday, 31 August
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.01Rancho Mission Viejo, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Thursday, 3 September
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, Friday, 4 September
Climate normal for this date — 60-year average.
0.01Rancho Mission Viejo, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01Rancho Mission Viejo, Sunday, 6 September
Climate normal for this date — 60-year average.
0Rancho Mission Viejo, 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 Rancho Mission Viejo, 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 Rancho Mission Viejo, 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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