Weather in San Luis Obispo, CA
San Luis Obispo, Sunday, 9 August, 08:53
Clear. Feels like 68°. High 83°, low 65°.
Monthly outlook for San Luis Obispo, CA: average high 82.3°, average low 63.1°. That is 5.4° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.0 inches. The warmest day looks like 19 August (92.8°), the coolest 14 August (56.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78.2° | 72.4° | +3.2° |
| 19 August – 28 August | 89.2° | 73.1° | +8.9° |
| 29 August – 7 September | at normal | 74.5° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Grover Beach (10 mi).
0
San Luis Obispo, Monday, 10 August
Mostly clear. High 83°, low 62°.
0San Luis Obispo, Tuesday, 11 August
Clear. High 79°, low 64°.
0
San Luis Obispo, Wednesday, 12 August
Partly cloudy. High 75°, low 58°.
0San Luis Obispo, Thursday, 13 August
Clear. High 72°, low 57°.
0San Luis Obispo, Friday, 14 August
Clear. High 73°, low 56°.
0San Luis Obispo, Saturday, 15 August
Clear. High 75°, low 57°.
0
San Luis Obispo, Sunday, 16 August
Overcast. High 77°, low 62°.
0San Luis Obispo, Monday, 17 August
Partly cloudy. High 80°, low 63°.
0San Luis Obispo, Tuesday, 18 August
Partly cloudy. High 87°, low 64°.
0San Luis Obispo, Wednesday, 19 August
Overcast. High 93°, low 67°.
0San Luis Obispo, Thursday, 20 August
Overcast. High 90°, low 69°.
0San Luis Obispo, Friday, 21 August
Clear. High 88°, low 68°.
0San Luis Obispo, Saturday, 22 August
Overcast. High 88°, low 67°.
0San Luis Obispo, Sunday, 23 August
Overcast. High 89°, low 66°.
0San Luis Obispo, Monday, 24 August
Clear. High 88°, low 66°.
0San Luis Obispo, Tuesday, 25 August
Climate normal for this date — 60-year average.
0San Luis Obispo, Wednesday, 26 August
Climate normal for this date — 60-year average.
0San Luis Obispo, Thursday, 27 August
Climate normal for this date — 60-year average.
0San Luis Obispo, Friday, 28 August
Climate normal for this date — 60-year average.
0San Luis Obispo, Saturday, 29 August
Climate normal for this date — 60-year average.
0San Luis Obispo, Sunday, 30 August
Climate normal for this date — 60-year average.
0San Luis Obispo, Monday, 31 August
Climate normal for this date — 60-year average.
0San Luis Obispo, Tuesday, 1 September
Climate normal for this date — 60-year average.
0San Luis Obispo, Wednesday, 2 September
Climate normal for this date — 60-year average.
0San Luis Obispo, Thursday, 3 September
Climate normal for this date — 60-year average.
0.02San Luis Obispo, Friday, 4 September
Climate normal for this date — 60-year average.
0.01San Luis Obispo, Saturday, 5 September
Climate normal for this date — 60-year average.
0San Luis Obispo, Sunday, 6 September
Climate normal for this date — 60-year average.
0San Luis Obispo, 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 San Luis Obispo, 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 San Luis Obispo, 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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