Weather in San Dimas, CA
San Dimas, Tuesday, 20 October, 14:46
Clear. Feels like 82°. High 83°, low 60°.
Monthly outlook for San Dimas, CA: average high 75.3°, average low 60.3°. That is 1.3° below the climate normal for October. Precipitation is expected on 3 days (about 2.0 inches), against a normal of 1 days and 0.4 inches. The warmest day looks like 28 October (86.3°), the coolest 23 October (48.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 76.7° | 78.2° | -0.9° |
| 30 October – 8 November | 73.1° | 75.5° | -1.3° |
| 9 November – 18 November | at normal | 72° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Covina (4 mi).
0.61
San Dimas, Wednesday, 21 October
Heavy rain. High 79°, low 59°.
0.81San Dimas, Thursday, 22 October
Rain. High 64°, low 52°.
0
San Dimas, Friday, 23 October
Partly cloudy. High 63°, low 49°.
0San Dimas, Saturday, 24 October
Clear. High 71°, low 50°.
0San Dimas, Sunday, 25 October
Clear. High 73°, low 52°.
0San Dimas, Monday, 26 October
Clear. High 83°, low 55°.
0
San Dimas, Tuesday, 27 October
Overcast. High 85°, low 71°.
0San Dimas, Wednesday, 28 October
Overcast. High 86°, low 72°.
0San Dimas, Thursday, 29 October
Overcast. High 77°, low 67°.
0.01San Dimas, Friday, 30 October
Light rain. High 72°, low 63°.
0.57San Dimas, Saturday, 31 October
Rain. High 65°, low 61°.
0San Dimas, Sunday, 1 November
Clear. High 72°, low 60°.
0San Dimas, Monday, 2 November
Clear. High 78°, low 64°.
0
San Dimas, Tuesday, 3 November
Mostly clear. High 77°, low 65°.
0San Dimas, Wednesday, 4 November
Overcast. High 75°, low 64°.
0.01San Dimas, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02San Dimas, Friday, 6 November
Climate normal for this date — 60-year average.
0.06San Dimas, Saturday, 7 November
Climate normal for this date — 60-year average.
0.08San Dimas, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04San Dimas, Monday, 9 November
Climate normal for this date — 60-year average.
0.03San Dimas, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.05San Dimas, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.03San Dimas, Thursday, 12 November
Climate normal for this date — 60-year average.
0.03San Dimas, Friday, 13 November
Climate normal for this date — 60-year average.
0.05San Dimas, Saturday, 14 November
Climate normal for this date — 60-year average.
0.08San Dimas, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06San Dimas, Monday, 16 November
Climate normal for this date — 60-year average.
0.04San Dimas, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.05San Dimas, Wednesday, 18 November
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 Dimas, 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 Dimas, 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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