Weather in San Geronimo, CA
San Geronimo, Saturday, 8 August, 16:52
Clear. Feels like 65°. High 78°, low 58°.
Monthly outlook for San Geronimo, CA: average high 71.7°, average low 54.4°. That is 0.3° below 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 9 August (86.4°), the coolest 18 August (52.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 71.3° | 72.5° | -0.7° |
| 18 August – 27 August | 72.2° | 72.1° | +0° |
| 28 August – 6 September | at normal | 74.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Marin City (12 mi).
0San Geronimo, Sunday, 9 August
Clear. High 86°, low 58°.
0
San Geronimo, Monday, 10 August
Overcast. High 70°, low 53°.
0San Geronimo, Tuesday, 11 August
Clear. High 72°, low 53°.
0
San Geronimo, Wednesday, 12 August
Partly cloudy. High 69°, low 53°.
0San Geronimo, Thursday, 13 August
Overcast. High 66°, low 56°.
0San Geronimo, Friday, 14 August
Overcast. High 65°, low 55°.
0San Geronimo, Saturday, 15 August
Clear. High 68°, low 54°.
0San Geronimo, Sunday, 16 August
Overcast. High 71°, low 53°.
0San Geronimo, Monday, 17 August
Overcast. High 69°, low 54°.
0San Geronimo, Tuesday, 18 August
Clear. High 73°, low 53°.
0San Geronimo, Wednesday, 19 August
Clear. High 72°, low 53°.
0San Geronimo, Thursday, 20 August
Partly cloudy. High 72°, low 54°.
0San Geronimo, Friday, 21 August
Clear. High 75°, low 55°.
0San Geronimo, Saturday, 22 August
Overcast. High 72°, low 55°.
0San Geronimo, Sunday, 23 August
Overcast. High 69°, low 54°.
0
San Geronimo, Monday, 24 August
Climate normal for this date — 60-year average.
0San Geronimo, Tuesday, 25 August
Climate normal for this date — 60-year average.
0San Geronimo, Wednesday, 26 August
Climate normal for this date — 60-year average.
0San Geronimo, Thursday, 27 August
Climate normal for this date — 60-year average.
0San Geronimo, Friday, 28 August
Climate normal for this date — 60-year average.
0San Geronimo, Saturday, 29 August
Climate normal for this date — 60-year average.
0San Geronimo, Sunday, 30 August
Climate normal for this date — 60-year average.
0San Geronimo, Monday, 31 August
Climate normal for this date — 60-year average.
0San Geronimo, Tuesday, 1 September
Climate normal for this date — 60-year average.
0San Geronimo, Wednesday, 2 September
Climate normal for this date — 60-year average.
0San Geronimo, Thursday, 3 September
Climate normal for this date — 60-year average.
0San Geronimo, Friday, 4 September
Climate normal for this date — 60-year average.
0San Geronimo, Saturday, 5 September
Climate normal for this date — 60-year average.
0San Geronimo, Sunday, 6 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 Geronimo, 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 Geronimo, 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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