Weather in Alum Rock, CA
Alum Rock, Sunday, 9 August, 02:21
Clear. Feels like 62°. High 90°, low 62°.
Monthly outlook for Alum Rock, CA: average high 90.6°, average low 59.2°. 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 11 August (101.6°), the coolest 17 August (55.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 91.5° | 85.7° | +3.2° |
| 19 August – 28 August | 89.1° | 84.6° | +2.5° |
| 29 August – 7 September | at normal | 85.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — San Jose (5 mi).
0
Alum Rock, Monday, 10 August
Overcast. High 93°, low 65°.
0
Alum Rock, Tuesday, 11 August
Clear. High 102°, low 66°.
0Alum Rock, Wednesday, 12 August
Clear. High 98°, low 60°.
0Alum Rock, Thursday, 13 August
Clear. High 88°, low 58°.
0Alum Rock, Friday, 14 August
Clear. High 91°, low 56°.
0
Alum Rock, Saturday, 15 August
Partly cloudy. High 92°, low 57°.
0Alum Rock, Sunday, 16 August
Overcast. High 90°, low 59°.
0Alum Rock, Monday, 17 August
Partly cloudy. High 87°, low 56°.
0Alum Rock, Tuesday, 18 August
Clear. High 85°, low 57°.
0Alum Rock, Wednesday, 19 August
Clear. High 85°, low 63°.
0Alum Rock, Thursday, 20 August
Overcast. High 83°, low 61°.
0Alum Rock, Friday, 21 August
Overcast. High 88°, low 56°.
0
Alum Rock, Saturday, 22 August
Mostly clear. High 91°, low 56°.
0Alum Rock, Sunday, 23 August
Mostly clear. High 93°, low 59°.
0Alum Rock, Monday, 24 August
Clear. High 95°, low 56°.
0Alum Rock, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Alum Rock, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Alum Rock, Thursday, 27 August
Climate normal for this date — 60-year average.
0Alum Rock, Friday, 28 August
Climate normal for this date — 60-year average.
0Alum Rock, Saturday, 29 August
Climate normal for this date — 60-year average.
0Alum Rock, Sunday, 30 August
Climate normal for this date — 60-year average.
0Alum Rock, Monday, 31 August
Climate normal for this date — 60-year average.
0Alum Rock, Tuesday, 1 September
Climate normal for this date — 60-year average.
0Alum Rock, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Alum Rock, Thursday, 3 September
Climate normal for this date — 60-year average.
0Alum Rock, Friday, 4 September
Climate normal for this date — 60-year average.
0Alum Rock, Saturday, 5 September
Climate normal for this date — 60-year average.
0Alum Rock, Sunday, 6 September
Climate normal for this date — 60-year average.
0Alum Rock, 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 Alum Rock, 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 Alum Rock, 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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