Weather in Rancho Santa Margarita, CA
Rancho Santa Margarita, Sunday, 9 August, 11:30
Clear. Feels like 85°. High 89°, low 69°.
Monthly outlook for Rancho Santa Margarita, CA: average high 89.7°, average low 68.7°. That is 5.5° 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 24 August (99°), the coolest 14 August (61.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 86° | 79.9° | +3.4° |
| 19 August – 28 August | 95.7° | 80.4° | +8.5° |
| 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 (4 mi).
0
Rancho Santa Margarita, Monday, 10 August
Mostly clear. High 91°, low 67°.
0
Rancho Santa Margarita, Tuesday, 11 August
Partly cloudy. High 86°, low 67°.
0Rancho Santa Margarita, Wednesday, 12 August
Clear. High 84°, low 65°.
0Rancho Santa Margarita, Thursday, 13 August
Mostly clear. High 80°, low 61°.
0
Rancho Santa Margarita, Friday, 14 August
Overcast. High 82°, low 61°.
0Rancho Santa Margarita, Saturday, 15 August
Overcast. High 81°, low 66°.
0
Rancho Santa Margarita, Sunday, 16 August
Light rain. High 84°, low 67°.
0Rancho Santa Margarita, Monday, 17 August
Partly cloudy. High 89°, low 66°.
0Rancho Santa Margarita, Tuesday, 18 August
Partly cloudy. High 93°, low 69°.
0.03Rancho Santa Margarita, Wednesday, 19 August
Light rain. High 96°, low 73°.
0.04Rancho Santa Margarita, Thursday, 20 August
Light rain. High 95°, low 74°.
0Rancho Santa Margarita, Friday, 21 August
Clear. High 95°, low 73°.
0Rancho Santa Margarita, Saturday, 22 August
Overcast. High 93°, low 72°.
0Rancho Santa Margarita, Sunday, 23 August
Clear. High 96°, low 74°.
0Rancho Santa Margarita, Monday, 24 August
Clear. High 99°, low 75°.
0Rancho Santa Margarita, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Thursday, 27 August
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Friday, 28 August
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Saturday, 29 August
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Sunday, 30 August
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Monday, 31 August
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.01Rancho Santa Margarita, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Thursday, 3 September
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, Friday, 4 September
Climate normal for this date — 60-year average.
0.01Rancho Santa Margarita, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01Rancho Santa Margarita, Sunday, 6 September
Climate normal for this date — 60-year average.
0Rancho Santa Margarita, 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 Santa Margarita, 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 Santa Margarita, 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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