Weather in Alta Loma, CA
Alta Loma, Friday, 13 November, 01:20
Light rain. Feels like 61°. High 65°, low 52°.
Monthly outlook for Alta Loma, CA: average high 61.2°, average low 49.7°. That is 3.5° below the climate normal for November. Precipitation is expected on 7 days (about 2.6 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 27 November (72.7°), the coolest 17 November (38.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 56.6° | 68.3° | -6.5° |
| 23 November – 2 December | 68.8° | 65.3° | +1.9° |
| 3 December – 12 December | at normal | 63.5° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Rancho Cucamonga (2 mi).
0.22Alta Loma, Saturday, 14 November
Rain. High 67°, low 47°.
0
Alta Loma, Sunday, 15 November
Mostly clear. High 59°, low 44°.
0.31Alta Loma, Monday, 16 November
Rain. High 57°, low 47°.
0.07Alta Loma, Tuesday, 17 November
Light rain. High 49°, low 39°.
0.01Alta Loma, Wednesday, 18 November
Light rain. High 53°, low 39°.
0.81Alta Loma, Thursday, 19 November
Rain. High 55°, low 52°.
0.9Alta Loma, Friday, 20 November
Rain. High 52°, low 48°.
0.11Alta Loma, Saturday, 21 November
Light rain. High 51°, low 47°.
0
Alta Loma, Sunday, 22 November
Overcast. High 58°, low 46°.
0
Alta Loma, Monday, 23 November
Clear. High 63°, low 50°.
0Alta Loma, Tuesday, 24 November
Overcast. High 64°, low 54°.
0Alta Loma, Wednesday, 25 November
Clear. High 70°, low 54°.
0Alta Loma, Thursday, 26 November
Overcast. High 72°, low 57°.
0Alta Loma, Friday, 27 November
Mostly clear. High 73°, low 59°.
0Alta Loma, Saturday, 28 November
Clear. High 70°, low 60°.
0.15Alta Loma, Sunday, 29 November
Climate normal for this date — 60-year average.
0.09
Alta Loma, Monday, 30 November
Climate normal for this date — 60-year average.
0.03Alta Loma, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.03Alta Loma, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Alta Loma, Thursday, 3 December
Climate normal for this date — 60-year average.
0.11Alta Loma, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Alta Loma, Saturday, 5 December
Climate normal for this date — 60-year average.
0.11Alta Loma, Sunday, 6 December
Climate normal for this date — 60-year average.
0.13Alta Loma, Monday, 7 December
Climate normal for this date — 60-year average.
0.05Alta Loma, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.04Alta Loma, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.04Alta Loma, Thursday, 10 December
Climate normal for this date — 60-year average.
0.08Alta Loma, Friday, 11 December
Climate normal for this date — 60-year average.
0.06Alta Loma, Saturday, 12 December
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 Alta Loma, 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 Alta Loma, 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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