Weather in San Marino, CA
San Marino, Sunday, 9 August, 05:57
Clear. Feels like 72°. High 98°, low 72°.
Monthly outlook for San Marino, CA: average high 94.9°, average low 75.5°. That is 3.1° 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 24 August (105.1°), the coolest 14 August (66.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 91.2° | 89.6° | +0.9° |
| 19 August – 28 August | 101.2° | 89.9° | +6.2° |
| 29 August – 7 September | at normal | 91.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — San Gabriel (2 mi).
0
San Marino, Monday, 10 August
Partly cloudy. High 96°, low 69°.
0
San Marino, Tuesday, 11 August
Overcast. High 92°, low 74°.
0
San Marino, Wednesday, 12 August
Clear. High 89°, low 71°.
0San Marino, Thursday, 13 August
Clear. High 85°, low 68°.
0San Marino, Friday, 14 August
Overcast. High 86°, low 66°.
0San Marino, Saturday, 15 August
Overcast. High 87°, low 71°.
0San Marino, Sunday, 16 August
Overcast. High 88°, low 72°.
0
San Marino, Monday, 17 August
Mostly clear. High 92°, low 74°.
0San Marino, Tuesday, 18 August
Overcast. High 97°, low 78°.
0San Marino, Wednesday, 19 August
Clear. High 101°, low 81°.
0San Marino, Thursday, 20 August
Overcast. High 99°, low 82°.
0San Marino, Friday, 21 August
Clear. High 100°, low 82°.
0.02
San Marino, Saturday, 22 August
Light rain. High 99°, low 81°.
0San Marino, Sunday, 23 August
Partly cloudy. High 102°, low 82°.
0San Marino, Monday, 24 August
Clear. High 105°, low 84°.
0San Marino, Tuesday, 25 August
Climate normal for this date — 60-year average.
0San Marino, Wednesday, 26 August
Climate normal for this date — 60-year average.
0San Marino, Thursday, 27 August
Climate normal for this date — 60-year average.
0San Marino, Friday, 28 August
Climate normal for this date — 60-year average.
0San Marino, Saturday, 29 August
Climate normal for this date — 60-year average.
0San Marino, Sunday, 30 August
Climate normal for this date — 60-year average.
0San Marino, Monday, 31 August
Climate normal for this date — 60-year average.
0San Marino, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.02San Marino, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.01San Marino, Thursday, 3 September
Climate normal for this date — 60-year average.
0San Marino, Friday, 4 September
Climate normal for this date — 60-year average.
0.01San Marino, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01San Marino, Sunday, 6 September
Climate normal for this date — 60-year average.
0San Marino, 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 Marino, 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 Marino, 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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