Weather in Alta Loma, CA
Alta Loma, Friday, 13 November, 13:36
Overcast. Feels like 61°. High 62°, low 56°.
Monthly outlook for Alta Loma, CA: average high 64.4°, average low 53.1°. That is 1.7° below the climate normal for November. Precipitation is expected on 7 days (about 1.2 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 22 November (72.9°), the coolest 17 November (39.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 61.5° | 68.3° | -3.7° |
| 23 November – 2 December | 69.3° | 65.3° | +2.2° |
| 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).
0.24
Alta Loma, Saturday, 14 November
Rain. High 68°, low 53°.
0
Alta Loma, Sunday, 15 November
Clear. High 60°, low 45°.
0.06Alta Loma, Monday, 16 November
Light rain. High 56°, low 48°.
0.07Alta Loma, Tuesday, 17 November
Light rain. High 49°, low 40°.
0.1Alta Loma, Wednesday, 18 November
Light rain. High 51°, low 40°.
0.36Alta Loma, Thursday, 19 November
Rain. High 62°, low 46°.
0.05Alta Loma, Friday, 20 November
Light rain. High 64°, low 57°.
0Alta Loma, Saturday, 21 November
Overcast. High 71°, low 57°.
0Alta Loma, Sunday, 22 November
Clear. High 73°, low 59°.
0Alta Loma, Monday, 23 November
Overcast. High 67°, low 58°.
0
Alta Loma, Tuesday, 24 November
Mostly clear. High 71°, low 58°.
0Alta Loma, Wednesday, 25 November
Overcast. High 72°, low 60°.
0Alta Loma, Thursday, 26 November
Overcast. High 68°, low 58°.
0Alta Loma, Friday, 27 November
Overcast. High 70°, low 57°.
0Alta Loma, Saturday, 28 November
Overcast. High 69°, 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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