Weather in San Bruno, CA
San Bruno, Sunday, 9 August, 10:40
Mostly clear. Feels like 69°. High 83°, low 59°.
Monthly outlook for San Bruno, CA: average high 69.6°, average low 57.5°. That is 0.2° 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 (83.3°), the coolest 11 August (56.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 69.8° | 69.3° | +0.2° |
| 19 August – 28 August | 69.3° | 69.7° | -0.2° |
| 29 August – 7 September | at normal | 71° | — |
August records over 66 years
0
San Bruno, Monday, 10 August
Partly cloudy. High 81°, low 59°.
0San Bruno, Tuesday, 11 August
Partly cloudy. High 67°, low 56°.
0San Bruno, Wednesday, 12 August
Partly cloudy. High 66°, low 56°.
0San Bruno, Thursday, 13 August
Mostly clear. High 66°, low 58°.
0San Bruno, Friday, 14 August
Partly cloudy. High 66°, low 57°.
0San Bruno, Saturday, 15 August
Mostly clear. High 66°, low 57°.
0
San Bruno, Sunday, 16 August
Overcast. High 66°, low 58°.
0San Bruno, Monday, 17 August
Overcast. High 68°, low 58°.
0San Bruno, Tuesday, 18 August
Mostly clear. High 68°, low 57°.
0San Bruno, Wednesday, 19 August
Overcast. High 68°, low 58°.
0San Bruno, Thursday, 20 August
Overcast. High 66°, low 56°.
0San Bruno, Friday, 21 August
Partly cloudy. High 68°, low 56°.
0San Bruno, Saturday, 22 August
Partly cloudy. High 71°, low 57°.
0San Bruno, Sunday, 23 August
Overcast. High 71°, low 59°.
0San Bruno, Monday, 24 August
Mostly clear. High 72°, low 59°.
0San Bruno, Tuesday, 25 August
Climate normal for this date — 60-year average.
0San Bruno, Wednesday, 26 August
Climate normal for this date — 60-year average.
0San Bruno, Thursday, 27 August
Climate normal for this date — 60-year average.
0San Bruno, Friday, 28 August
Climate normal for this date — 60-year average.
0San Bruno, Saturday, 29 August
Climate normal for this date — 60-year average.
0San Bruno, Sunday, 30 August
Climate normal for this date — 60-year average.
0San Bruno, Monday, 31 August
Climate normal for this date — 60-year average.
0San Bruno, Tuesday, 1 September
Climate normal for this date — 60-year average.
0San Bruno, Wednesday, 2 September
Climate normal for this date — 60-year average.
0San Bruno, Thursday, 3 September
Climate normal for this date — 60-year average.
0San Bruno, Friday, 4 September
Climate normal for this date — 60-year average.
0San Bruno, Saturday, 5 September
Climate normal for this date — 60-year average.
0San Bruno, Sunday, 6 September
Climate normal for this date — 60-year average.
0San Bruno, 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 Bruno, 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 Bruno, 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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