Weather in San Dimas, CA
San Dimas, Saturday, 8 August, 20:27
Clear. Feels like 83°. High 96°, low 68°.
Monthly outlook for San Dimas, CA: average high 91.9°, average low 72.5°. That is 1.4° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 9 August (98.3°), the coolest 8 August (68.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 92° | 89.8° | +1.2° |
| 18 August – 27 August | 91.7° | 89.5° | +1.2° |
| 28 August – 6 September | at normal | 91.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Covina (4 mi).
0
San Dimas, Sunday, 9 August
Mostly clear. High 98°, low 70°.
0
San Dimas, Monday, 10 August
Partly cloudy. High 94°, low 71°.
0
San Dimas, Tuesday, 11 August
Overcast. High 93°, low 76°.
0
San Dimas, Wednesday, 12 August
Clear. High 90°, low 73°.
0San Dimas, Thursday, 13 August
Overcast. High 85°, low 71°.
0San Dimas, Friday, 14 August
Overcast. High 85°, low 70°.
0San Dimas, Saturday, 15 August
Clear. High 91°, low 71°.
0San Dimas, Sunday, 16 August
Overcast. High 92°, low 72°.
0San Dimas, Monday, 17 August
Mostly clear. High 95°, low 75°.
0San Dimas, Tuesday, 18 August
Overcast. High 95°, low 77°.
0San Dimas, Wednesday, 19 August
Overcast. High 96°, low 77°.
0San Dimas, Thursday, 20 August
Clear. High 93°, low 75°.
0San Dimas, Friday, 21 August
Clear. High 89°, low 72°.
0San Dimas, Saturday, 22 August
Clear. High 88°, low 70°.
0San Dimas, Sunday, 23 August
Clear. High 90°, low 70°.
0San Dimas, Monday, 24 August
Climate normal for this date — 60-year average.
0San Dimas, Tuesday, 25 August
Climate normal for this date — 60-year average.
0San Dimas, Wednesday, 26 August
Climate normal for this date — 60-year average.
0San Dimas, Thursday, 27 August
Climate normal for this date — 60-year average.
0San Dimas, Friday, 28 August
Climate normal for this date — 60-year average.
0San Dimas, Saturday, 29 August
Climate normal for this date — 60-year average.
0San Dimas, Sunday, 30 August
Climate normal for this date — 60-year average.
0San Dimas, Monday, 31 August
Climate normal for this date — 60-year average.
0.03San Dimas, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04San Dimas, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.01San Dimas, Thursday, 3 September
Climate normal for this date — 60-year average.
0San Dimas, Friday, 4 September
Climate normal for this date — 60-year average.
0.01San Dimas, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01San Dimas, 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 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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